Sw360-Ag-mmo-012 5.56mm Lightweight Machine Gun,Mk46 Mod 1 Feb. 2006

NAVY SW360-AG-MMO-012SOFWEP-01-G10-00017-02

Operator’s Manual5.56mm Lightweight Machine Gun, MK46 MOD1

NSN 1005-01-534-3682

DISTRIBUTION STATEMENT B: Distribution authorized to U.S. Government agencies to protect proprietary information 15 Feb 97.

DESTRUCTION NOTICE – For unclassified, limited documents, destroy by any method that willprevent disclosure of contents or reconstruction of the document.

28 February 2006FN Manufacturing, LLC. P.O. Box 24257 Columbia, SC 29224


NSN 1005-01-534-3682


THIS PAGE INTENTIONALLY LEFT BLANK



NSN 1005-01-534-3682

1. Retain this sheet in front of manual for reference purposes.

2. Dates of issue for original and changes are:

Original 28 February 2006


WARNINGS

1. Be sure to clear weapon before disassembling, cleaning, inspecting, transporting orstoring.

2. Stay clear of muzzle and always keep weapon pointed downrange.

3. Keep safety on until ready to fire.

4. Before firing, make sure the barrel is locked tightly.

5. Never remove trigger mechanism before weapon is cleared. Removal of the triggermechanism from a loaded weapon will cause a runaway.

6. Hot fired cartridge cases may strike right arm as they are ejected from the weaponwhen firing left-handed. Operators firing left-handed should not roll up right armsleeve of clothing.

7. Never open the cover of weapon if the barrel is hot and you suspect there is a liveround in chamber.

a


WARNINGS (cont)

8. Always look into chamber after clearing weapon.

9. With ammunition and weapon exposed to the sun on a hot sunny day a cook-off can occur with 50 rounds of continuous firing.

10. Use only blank M200 Ammunition with the Blank Firing Attachment (BFA).

11 Do not interchange barrel assemblies (to include spare barrel) or bolt assemblies from one weapon to another without having headspace checked.

12. Do not allow round to hit any hard surface or it may fire. Dispose of live rounds appropriately.

13. Do not modify components, use repair parts, or interchange components other than those authorized by this manual. This includes other models of machine guns or foreign versions of this weapon.

14. Never reload a runaway weapon until it has been repaired or replaced.

b


WARNINGS (cont)

15. Ensure moving part components are in the forward position.

16. If nothing is ejected and barrel is hot (200 rounds fired within a 2 minute period); DO NOT open the cover, push safety to right (red band not visible). Keep weapon pointed down range, and remain clear for 15 minutes, clear your weapon.

17. The firing of long sustained bursts of greater than 25 rounds or a continuous firing of approximately 200 rounds will present a danger of “cook off” in the event a malfunction occurs; and will accelerate the wearing out of the barrel.

18. Never remove a hot barrel to clear malfunction. Wait 15 minutes for barrel to cool.

19. Blank ammunition should not be fired toward personnel within 20 feet or less from the muzzle because fragments of a closure wad or particles of unburnt propellant may inflict injury within that range.

20. All personnel shall wear approved single hearing protection devices during training exercises.

c


WARNINGS (cont)

21. Sound Suppressor Kit; refer to Special Operations Peculiar Modifications Accessories kit ST 23-31-1 and heed all Warnings, Cautions, and Notes pertaining to the use and maintenance of sound suppressor.

22. When the Lower Pin (pivot) retention is not positively retained it can work loose during firing. If it works completely out, the Trigger Mechanism can separate from the weapon. Separation of the Trigger Mechanism when the weapon is loaded will create a runaway weapon.

23. Ensure barrel is not obstructed by water and mud.

d


e

1. Rotate usage of Barrel Assemblies to minimize wear.

placed the safety in the on position (red band not visible). However, doing sorenders the weapon not “Combat Ready” and if bolt is mistakenly charged whenammunition has been loaded with the safety on, damage to the weapon and/orammunition can occur.

3. DO NOT use tools to tighten Blank Firing Attachment, hand tighten only.

2. The weapon can be manipulated to the close bolt on a empty chamber and

4. Ensure barrel(s) is not obstructed by water or mud.

5. To avoid damage to equipment, DO NOT use dry cleaning solvent on plasticcomponents, sealed buffer, etc.

6. DO NOT use abrasives to clean the bore, piston, gas cylinder, or gas block.

7. DO NOT lubricate chrome areas of piston, gas cylinder, or gas block.

8. Be sure to clean your barrel(s) bore from chamber end to the muzzle end withbarrel removed from weapon.

CAUTIONS


CAUTIONS (cont)

9. Improper assembly of the transfer mechanism can cause damage to the receiver and/or theassembly itself. If the horizontal pins of the transfer assembly are not placed on the hooks,inside the receiver, when the buttstock is pivoted in the up position for pinning, thereceiver hooks can be bent. If the horizontal pins of the transfer assembly are rotated tothe vertical position and the bottom pin is hooked into the lightening hole in the bottom ofthe receiver, the pin can be sheared, damaged or lost when weapon is fired.

10. If ammunition is wet or dirty, wipe it off with a dry rag prior to use. Do not lubricateammunition. Dust and other abrasives that collect on oily ammunition are damaging tooperating parts of the weapon. Lubricated cartridges produce excessive chamber pressure.

11. Never touch a Hot Barrel.

f



g


Operator’s Manual

5.56mm Lightweight Machine Gun, MK46 MOD1(NSN 1005-01-534-3682)

DISTRIBUTION STATEMENT B: Distribution authorized to U.S. Government agenciesto protect proprietary information 15 Feb 97.

DESTRUCTION NOTICE – For unclassified, limited documents, destroy by anymethod that will prevent disclosure of contents or reconstruction of the document.

FN Manufacturing, LLC P.O. Box 24257 Columbia, SC 29224

i


REPORTING ERRORS AND RECOMMENDING IMPROVEMENTSErrors in this publication or recommendations for its improvement shall be

Submitted to:Commander

Crane DivisionNaval Surface Warfare Center

Attn; Code 4081, Bldg 2521300 Highway 361Crane, IN. 47522

ii


TABLE OF CONTENTS

CHAPTER 1 INTRODUCTION PAGESection I General Information 1-1

1.1 Scope 1-31.2 Corrosion, Prevention and Control 1-31.3 Reporting Equipment Improvement Recommendations(EIR)

1-4

Section II Equipment Description 1-51.4 Equipment Characteristics, Capabilities and Features 1-51.5 Location and Description of Major Components 1-61.6 Equipment Data 1-12

iii


CHAPTER 2 OPERATING INSTRUCTION PAGE Section I Preventative Maintenance Checks and Services (PMCS) 2-1 2.1 Preventative Maintenance Checks and Services (PMCS) 2-2 Section II Operation of Weapon 2-11

2.2 Operation of Weapon 2-11 2.3 Loading 2-12 2.4 Clearing 2-18 2.5 Field Zero, Rear Sight 2-22 2.6 Field Zero, Front Sight 2-27 2.7 Confirmation of Battlefield Zero 2-30 2.8 Immediate Action 2-31 2.9 If Immediate Action Does Not Work 2-33 2.10 Stuck Cartridge Case or Live Round 2-34 2.11 Runaway Machine Gun 2-38 2.12 Barrel Assembly 2-39 2.13 Bipod Positioning and Stowage 2-40 2.14 Accessory 2-42 2.14.1 Stock Assembly, Collapsible 2-42 2.14.2 100 Round Assault Magazine 2-44 2.14.3 Blank Firing Attachment (BFA) 2-47 2.14.4 Blank Firing Barrel (BFB) 2-50 2.14.5 Sound Suppressor (SOPMOD) 2-51

iv


CHAPTER 2 OPERATING INSTRUCTION (cont) PAGE Section III Operation Under Unusual Condition 2-53 2.15 Environment/Weather (Protective Measures) 2-53 2.15.1 Exposure to Water-Mud 2-55 2.15.2 Hot-Wet/Salt Air 2-55 2.15.3 Hot-Dry-Sand-Dust 2-56 2.15.4 Cold-Ice-Snow 2-56 CHAPTER 3 MAINTENANCE INSTRUCTION Section I Lubrication Instructions 3-1

3.1 Lubrication Guide 3-1 Section II Troubleshooting Procedures 3-3

3.2 Troubleshooting 3-3 Section III Maintenance Procedures 3-16

3.3 Field Strip (Disassembly) 3-16 3.3.1 Sling & Snap Hook Assembly 3-16 3.3.2 Cover, Feed Mechanism Assembly 3-17 3.3.3 Buttstock w/Hydraulic Buffer 3-18 3.3.4 Trigger Assembly 3-19 3.3.5 Drive Spring & Return Rod Transfer Mechanism 3-20

v


CHAPTER 3 MAINTENANCE INSTRUCTION (cont) PAGE3.3.6 Moving Parts (Operating Rod, Slide Assembly &

Bolt Assembly)3-21

3.3.7 Barrel Assembly 3-223.3.8 Gas Cylinder Assembly 3-233.3.9 Bipod Assembly 3-24

3.4 Cleaning, Inspection and Repair 3-253.5 Field Strip (Assembly) 3-42

3.5.1 Bipod Assembly 3-423.5.2 Gas Cylinder Assembly 3-433.5.3 Barrel Assembly, Fluted 3-443.5.4 Moving Parts (Operating Rod, Slide Assembly &

Bolt Assembly)3-45

3.5.5 Drive Spring & Return Rod Transfer Mechanism 3-483.5.6 Trigger Assembly 3-503.5.7 Buttstock Assembly w/Hydraulic Buffer 3-513.5.8 Cover, Feed Mechanism Assembly 3-533.5.9 Sling & Snap Hook Assembly 3-54

3.6 Function Check 3-55

vi


CHAPTER 4 MAINTENANCE OF AUXILIARY EQUIPMENT PAGESection I Auxiliary Equipment 4-1

4.1 Blank Firing Attachment (BFA) 4-14.2 Stock Assembly, Collapsible (Accessory) 4-14.3 Magazine, Cartridge (100 Rd) 4-14.4 Accessory Kit Components (SOPMOD) 4-2

CHAPTER 5 AMMUNITION 5-1

APPENDIX A Basic Issue Items (BII) ListsSection ISection II

Scope- Basic Issue Items

A-1A-4

APPENDIX B Additional Authorized ListSection I Scope B-1Section II Additional Authorized List B-3

APPENDIX C Expendable/Durable Supplies and Materials ListSection I Scope C-1Section II Expendable/Durable Supplies and Materials List C-3

vii



viii


FRONT SIGHT

RECEIVER ASSEMBLY

BUTTSTOCK W / HYDRAULIC BUFFER

FEED TRAY

BARRELLATCH

1-1LEFT SIDE

CHAPTER 1 INTRODUCTION

Section I. General Information

TRIGGER MECHANISM ASSEMBLY


REAR SIGHT ASSEMBLY

COVER ASSEMBLY

HEAT SHIELDBARREL ASSEMBLY

(FLUTED)

BIPOD ASSEMBLY

LOWER RAIL ADAPTER

CHARGING HANDLE ASSEMBLY

COVER ASSEMBLY

RIGHT SIDE1-2


1.1 SCOPE A. Type of Manual: Operator’s Manual. B. Model number and equipment name: 5.56mm, Lightweight Machine Gun, MK46 MOD1

w/equipment. C. Purpose of equipment: The MK46 MOD 1 machine gun is designed as a fire team

automatic weapon providing suppressive fire at extended ranges allowing fire and movement to make contact with and destroy the enemy.

1.2 CORROSION, PREVENTION AND CONTROL (CPC) CPC of material is a continuing concern. It is important any corrosion problems with this item be reported so that the problem can be corrected and improvements can be made to prevent the problem in the future. While corrosion is typically associated with rusting of metals, it can also include deterioration of other materials such as rubber or plastic. Unusual cracking, softening, swelling or breaking of these materials may be a result of a corrosion problem.

1-3


1.3 REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR)

If your machine guns need improvement, let us know. You, as the users, are the only oneswho can tell us what you don’t like about your equipment. Let us know why you don’tlike the design or performance. Tell us why a procedure is hard to perform.A reply will be furnished directly to you.Report to:

CommanderCrane Division

Naval Surface Warfare CenterAttn: Code 4081, Bldg 2521

300 Highway 361Crane, IN. 47522

1-4


Section II. EQUIPMENT DESCRIPTION

1.4 EQUIPMENT CHARACTERISTICS, CAPABILITIES AND FEATURES

A. CHARACTERISTICS:

The MK46 MOD1 Machine Gun is belt-fed, gas-operated, air-cooled, and fires from the open boltposition.

B. CAPABILITIES:

The MK46 MOD1 Machine Gun can be used as a Light Machine Gun (LMG). It can be fired fromthe shoulder, hand-held, or bipod steadied (prone) positions. It has two (2) barrel assemblies toextend the life of the barrels, retain accuracy, and allow for continuous firing over long periods oftime.

C. FEATURES:

The quick-change barrel is air-cooled and has a fixed headspace. The bolt is a multiple-lug typewhich rotates into a positive locked position in the barrel extension prior to firing. Gas is taken fromthe barrel acting on a piston directly to the bolt carrier (slide). The barrel has a preset gas orifice.The MK46 MOD1 is equipped with a spare barrel in addition to the main barrel. The weaponcontains four (4) integrated rail systems per MIL-STD-1913 capable of mounting various electro-optical devices.

1-5


1.5 LOCATION AND DESCRIPTION OF MAJOR COMPONENTS

Major Components of the Machine Gun are:

1. Barrel Assembly Houses cartridge for firing, directs projectile,and supports fixed front sight. Compensatorminimizes muzzle flash, reduces muzzle climb.Allows for easy attachment or detachment ofSOPMOD sound suppressor.

2. Lower Rail Adapter Allows easy attachment or detachment formounting of various SOPMOD electro-opticaldevices on three (3) independent rails.

3. Receiver Assembly Serves as a support for all major components.Houses action of weapon and through a seriesof guide rails, controls functioning of weapon.

4. Rear Sight Assembly Rear sight is adjustable for both windage andelevation.

1-6


1.5 LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)

Major Components of the Machine Gun are: (cont)5. Cover and Feed Mechanism Assembly

Provides support for rear sight andmeans for gaining access to feed tray.By means of cam and lever action,feeds linked ammunition and holdscartridges in position for feeding andchambering. Cover also provides forease of attachment or detachment formounting various SOPMOD electro-optical devices.

6. Feed Pawl Assembly Feeds linked belt ammunition, positionsand holds cartridges in position forstripping and feeding.

7. Feed Tray Assembly Serves as a guide for positioningcartridges and assists in chambering.

8. Cocking Handle Assembly Pulls the moving parts rearward. Movesin a guide rail fixed to the right side ofreceiver.1-7



Major Components of the Machine Gun are: (cont)

9. Buttstock Assembly w/Hydraulic Buffer Serves as a shoulder support for aimingand firing machine gun. Contains ahydraulic buffer for absorbing recoil energy.

10. Bolt Assembly Provides feeding, chambering, firing, andextraction, using the propellant gases andrecoil spring for power.

11. Slide Assembly Houses the bolt assembly, firing pin and rollerassembly and cams bolt assembly to lock andunlock.

12. Piston Assembly Transfers power from propelling gases to boltand slide assemblies to function the machinegun (move recoiling-parts rearward).

13. Spring, Helical Compression Provides power to the piston assembly formoving slide and bolt assemblies forwardduring weapon functioning.

1-8



Major Components of the Machine Gun are: (cont)

14. Return Rod and Transfer MechanismAssembly or Rod Assembly, Operating

Absorbs recoil from bolt, slide and pistonassemblies at the end of recoil movement, andtransfers recoil pressure to the buffer in thebuttstock.

15. Trigger Mechanism Assembly Houses the trigger, sear, safety, and controls thefiring of the machine gun.

16. Sling and Snap Hook Assembly17. Bipod, Assembly

Provides a means of carrying the weapon.Supports machine gun in prone position. The two(2) telescopic legs can be individually adjusted tothree (3) different lengths..

1-9



Major Components of the Machine Gun: (cont)

18. Gas Cylinder Assembly Locks bipod in place on receiver and provides passageway for operating gases.

19. 11 Rib Rail Cover Assembly Allows easy attachment/detachment onLower Rail Adaptors. Provides heat protection for hands.

20. Heat Shield Assembly Protects hands and other items from being burnt when coming onto contact with a hot barrel.

NOTE:FOR BASIC ITEMS OF ISSUE (BII), See Appendix A

1-10


1-11

EXPLODED VIEW

1

20

14

9

5

6

73

1110

12

15

1317

16

18

2

8 Not shown

4

19


1.6 EQUIPMENT DATA

Complete Weapon System 7.02 kg (15.44 lbs.)

Fluted Barrel Assembly 1.49 kg (3.28 lbs.)Included in Complete Weapon System:

Titanium Bipod Assembly 0.42 kg (0.94 lbs.)Fixed Buttstock 0.63 kg (1.39 lbs.)Sling Assembly 0.23 kg (0.52 lbs.)

Rib, Rail Cover (4 each)Blank Firing Attachment (BFA)

Miscellaneous Accessories

Collapsible Buttstock Assemblyw/Hydraulic Buffer

200 rd. Ammo Box (Filled)100 rd. Assault Magazine (Filled)

0.10 kg (0.22 lbs.) total0.08 kg (0.17 lbs.)

0.72kg (1.58 lbs.)

3.14 kg (6.92 lbs.)1.36 kg (3.00 lbs.)

1-12


1.6 EQUIPMENT DATA (cont)

LengthOverall Weapon (w/o BFA) 920.0 mm (36.22 in.)Barrel Assembly 414.0 mm (16.30 in.)Rifling Twist (RH) 1 turn in 7 inches

Rate of FireCyclic 750 rds / minSustained(3-5 burst, 4-5 seconds between bursts)

85 rds / min

Rapid(8-10 rd burst, 2-3 seconds between bursts)

100 rds / min

NOTERECOMMEND BARREL CHANGE AFTER FIRING 200 ROUNDS OF

CONTINUOUS FIRING TO ENSURE MAXIMUM BARREL LIFE

1-13


1.6 EQUIPMENT DATA (cont)

RangeMaximum 1,800 metersMaximum Effective 800 meters (Tracer Burnout)

SightsFront Semi-fixed hooded type postRear Fully adjustable peep type for elevation

and windage4 Integrated Rail System Attaches various sights by means of

grooved dove tail feature.

1-14


CHAPTER 2

OPERATING INSTRUCTIONS

Section I. PREVENTATIVE MAINTENACE CHECKS AND SERVICES (PMCS)

WARNING

BE SURE TO CLEAR WEAPON BEFORE DISASSEMBLY, CLEANING, INSPECTING, TRANSPORTING OR STORING.

THE FIRING OF LONG SUSTAINED BURSTS OF GREATER THAN 25 ROUNDS OR A CONTINUOUS FIRING OF APPROXIMATELY 200 ROUNDS WILL PRESENT A DANGER OF “COOK-OFF” IN THE EVENT A MALFUNCTION OCCURS; AND WILL ACCELERATE THE WEARING OUT OF THE BARREL.

2-1


2.1 PREVENTATIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

M.G., MK46 MOD 1 includes;Bipod Assembly, Softpak Cleaning Kit

Visually check for missing or damaged components.

Machine Gun 5.56; MK46 Mod 1 W / Basic Items of Issue

Before1

Not Fully Mission Capable if:

ProcedureLocation Item to Check/Service

IntervalItem No.

WARNINGDO NOT INTERCHANGE BARREL ASSEMBLIES (TO INCLUDE SPARE

BARREL) OR BOLT ASSEMBLIES FROM ONE MACHINE GUN TO ANOTHER WITHOUT HAVING HEADSPACE CHECKED. DOING SO MAY

RESULT IN INJURY TO PERSON OR DAMAGE TO WEAPON.

CAUTIONROTATE USAGE OF THE BARREL ASSEMBLIES TO MINIMIZE WEAR.

2-2


2.1 PREVENTATIVE MAINTENACE CHECKS AND SERVICES (PMCS) (cont)Item No. Interval Location

Item to Check/ServiceProcedure Not Fully

MissionCapable If:

1(cont)

Before Machine Gun, 5.56mm:MK46 MOD1W / Basic Items of Issue

Visually check formissing ordamagedcomponents

Includes;Scraper AssyWrench, SpannerOperator ManualBlank FiringAttachment(BFA)Sling andSnap Hook AssyBarrel Assy(spare)Carrying Case,Barrel**Front SightAdjusting Tool

** 1 for each 4 weapons

2-3




MissionCapable If:

2 Before BarrelAssembly (fluted)

Remove barrel;check bore andchamber

a. Anobstruction inbarrel cannot beremoved.

Using cleaning rodassembly andswab, removelubricant, foreignmaterial orobstructionsInstall and lockbarrel assemblysecurely inreceiver (Sparebarrel must also bechecked beforeuse)

b. Barrel willnot lock securelyin receiver.

2-4




MissionCapable If:

3 After BarrelAssembly (fluted)

Clear weapon;check chamber andbore forobstructions

a. Obstruction inbarrel cannot beremoved

Install and lockbarrel assemblysecurely inreceiver (Sparebarrel must also bechecked beforeuse)

b. Barrel willnot lock securelyin receiver.

NOTEWHEN A BARREL IS REMOVED DURING EXTENDED FIRING MISSIONS, LUBRICATION

SHOULD BE REAPPLIED AFTER COOLING PERIOD.

2-5




MissionCapable If:

4 Before Cover, Feed Mechanism Squeeze coverlatches and raisecover. Let go oflatches and closecover. Inspectcover assembly toensure it willremain fullyopened.

a. Latches failto hold covershut.

b. Catch andspring fails tohold coverassemblyfully open.

2-6


2-7



MissionCapable If:

5 Before CockingHandleAssembly

With palm up pullcocking handlerearward to chargeweapon. Confirmthat bolt assemblymoves freelywithout bindingand locks to rear.

Cocking handledoes not fullycharge weapon.

6 Before Safety With boltassembly locked tothe rear (cockedposition), pushsafety to “SAFE”(RED BAND notvisible). Pulltrigger; boltassembly shouldnot move forward.

The boltassembly movesforward with thesafety engaged.



Item toCheck/Service

Procedure Not Fully MissionCapable If:

7 Before BoltAssembly

While chargingweapon, confirm thatbolt assembly movesfreely without bindingand locks in cockedposition.

a. Bolt assembly bindsin receiver.

b. Bolt assembly fails tolock in cockedposition.

NOTEENSURE PROPER LUBRICATION HAS BEEN APPLIED TO THE WEAPON.

8 After If cyclic rate slowsdown or weaponbecomes sluggish;clear, clean andlubricate weapon.

a. Cleaning andlubricating weapondoes not improvefunctioning.

b. Forward to unitarmorer forcorrective action assoon as possible ifweapon does notfunction properly.

2-8




MissionCapable If:

9 After MachineGun, LMG

Clear,disassemble, clean,inspect, lubricate,reassemble andfunction checkweapon.

a. Any part toinclude thespare barrelassembly isbrokenmissing ordamaged tothe extent thatit could causethe weapon tomalfunction.

b. Spare barrelassembly isnotaccompanyingthe weapon.

2-9




MissionCapable If:

10 Before Sling & SnaphookAssembly

Visually inspectfor improperlyassembled, broken,missing ordamaged partsappearance.

Forward to unitarmorer forcorrective action.

2-10


2-11

Section II. OPERATION OF THE WEAPON

2.2 OPERATION OF THE WEAPON

WARNINGTHE FIRING OF LONG SUSTAINED BURSTS OF GREATER THAN 25 ROUNDS ORA CONTINUOUS FIRING OF APPROXIMATELY 200 ROUNDS WILL PRESENT A

DANGER OF “COOKOFF” IN THE EVENT A MALFUNCTION OCCURS; AND WILLACCELERATE THE WEARING OUT OF BARRELS.

With palm up, charge weapon by pulling cocking handle to rear, to lock bolt (cock weapon). Push cocking handle forward until you hear it click. Push safety to right (RED BAND Not Visible).

COCKING HANDLE(FORWARD POSITION)

SAFETYOPPOSITE SIDE VIEW


2.3 LOADING

COVER ASSEMBLYSqueeze latches to open cover assembly

COVER LATCHES

CHAMBER

Raise Feed Tray Assembly. Look into chamber to make sure there is no round chambered. Lower Feed Tray Assembly.

2-12


2.3 LOADING (cont)

Attach 100-round semi rigid ammunition pack containing link belt to underside of receiver, after aligning box/magazine latchwith receiver dovetail.

DOVE TAIL

100 ROUND SEMI RIGIDAMMUNITION PACK

Pull outward on ammunition box or magazine to ensure that the aligning box/magazine latch is engaged

2-13


2.3 LOADING (cont)

NOTEDURING TRAINING EXERCISES WHERE BROKEN (SHORTENED) BELTS ARE USED

AND THE LEAD LINK TAB IS NOT AVAILABLE, THE LEAD ROUND SHOULD BESTRIPPED FROM THE LINK. PLACE THE OPEN LINK WELL ONTO THE FEED

TRAY UNTIL THE FIRST ROUND IS AGAINST THE CARTRIDGE STOP. THE OPEN SIDE OF LINKS IS DOWN.

Place link belt in feed tray assembly with first round against cartridge stop. Feed pawls will hold belt in the proper position. Close cover assembly.

2-14


2.3 LOADING (cont)

Loading Using Feeder StrapAttach first link of belt to feeder strap as shown. NOTE: IT MAY BE NECESSARY TO REMOVE THE FIRST BULLET TO HAVE A LINK AVAILABLE TO ATTACH THE FEEDER STRAP.

Charge Weapon and place safety in safe position (red line not visible). Push charging handle forward to locked position.

Insert Feeder Strap from left side as shown.

Push Feeder Strap into weapon until it protrudes from right side as shown.

2-15


2.3 LOADING (cont)

Loading Using Feeder Strap (cont)

Pull Feeder Strap to right until white line can be seen from right side of weapon as shown.

The weapon is now loaded.

Note: When the first round is fired the Feeder Strap will be ejected from the weapon.

White line indicating first round is properly positioned

2-16


2.3 LOADING (cont)

WARNINGYOUR WEAPON IS NOW COMBAT READY, E.G., AMMUNITION LOADED, BOLT

TO THE REAR AND SAFETY ON (RED BAND NOT VISIBLE).

CAUTIONTHE WEAPON CAN BE MANIPULATED TO CLOSE THE BOLT ON AN EMPTYCHAMBER AND PLACE THE SAFETY IN THE ON POSITION (RED BAND NOT

VISIBLE). HOWEVER, DOING SO RENDERS THE WEAPON NOT "COMBATREADY", AND IF THE BOLT IS MISTAKENLY CHARGED WHEN AMMUNITION

HAS BEEN LOADED WITH THE SAFETY ON, DAMAGE TO THE WEAPON AND/ORAMMUNITION CAN OCCUR.

2-17


2.4 CLEARING

Charge weapon (pull cocking handle rearward). Be sure bolt is locked in rear position.Push charging handle forward until you hear it click.

Push safety to right (RED BAND not visible).

SAFETYCOCKING HANDLE(FORWARD POSITION)

2-18


2.4 CLEARING (cont)

COVER ASSEMBLY

AMMUNITION BELT

Squeeze latches to open cover assembly. Remove ammunition belt and loose links.

2-19


2.4 CLEARING (cont)NOTE

WHEN CLEARING THE WEAPON, ENSURE THE CLEANING RODDOES NOT TOUCH THE EJECTOR.

CHAMBER

Raise feed tray assembly. Lookinto chamber. Round still inChamber? Remove it.A cleaning rod (30”) may be usedto ensure barrel and chamber is cleared.

Receiver/Cavity/Chamber empty?Lower feed tray assembly. CloseCover assembly. Make sure itlocks shut.

2-20


2.4 CLEARING (cont)

Push safety to left (RED BAND visible). Hold cocking handle to rear, pull trigger, andride bolt forward to close and lock.

NOTEWHEN CLEARING THE WEAPON AFTER USE, ENSURE THE CLEANING ROD

USED FOR CLEARING DOES NOT TOUCH THE EJECTOR

2-21


2.5 FIELD ZERO, REAR SIGHTNOTE

WEAPON AND BOTH BARREL ASSEMBLIES HAVE BEEN ZEROED AT 300 METERS

PRIOR TO SHIPMENT.

REAR SIGHT WINDAGE ADJUSTMENT:

EACH SIGHT MAY VARY AS TO HOW MANY CLICKS ARE NEEDED TO CENTER THE SIGHT. TO CHECK YOUR SIGHT, START WITH THE SIGHT LEAF ALL THE WAY TO THE LEFT; COUNTING THE CLICKS, ROTATE THE WINDAGE KNOB (FRONT KNOB) UNTIL THE SIGHT LEAF STOPS ON THE RIGHT SIDE. DIVIDE THE NUMBER OF CLICKS BY TWO AND MOVE LEAF SIGHT LEFT TO CENTER-EXAMPLE: 24 CLICKS=12 TO CENTER; EXAMPLE: 23 CLICKS = 12 TO CENTER (11+12=23, USE LARGER FIGURE).

To field zero your machine gun for windage, you must first center your rear sight leaf (see note above).

WINDAGE KNOB

2-22


2.5 FIELD ZERO, REAR SIGHT (cont)NOTE

TO MAKE THE PEEP SIGHT EASIER TO GRASP WITH FINGERS OR SPANNER WRENCH, ROTATE THE ELEVATION KNOB (REAR KNOB) TO THE “10” (1000 METER) MARK. AFTER ADJUSTMENT, MOVE THE ELEVATION KNOB BACK TO ORIGINAL POSITION.

REAR SIGHT ELEVATION ADJUSTMENT: EACH SIGHT MAY VARY AS TO HOW MANY CLICKS ARE NEEDED TO CENTER THE SIGHT. TO CHECK THE SIGHT, START WITH THE PEEP SIGHT POST ALL THE WAY TO THE TOP; COUNTING THE CLICKS, SCREW IT DOWN AS FAR AS IT WILL GO. DIVIDE THE NUMBER OF CLICKS BY TWO AND MOVE PEEP SIGHT TO CENTER – EXAMPLE: 13 CLICKS = 7 TO CENTER (6 + 7 = 13, USE LARGER FIGURE). To field zero your machine gun in elevation, you must center your peep sight (see note above).

2-23


2.5 FIELD ZERO, REAR SIGHT (cont)

PEEP SIGHT

ELEVATION KNOB

Rotate the elevation knob (rear knob) to the desired range. Fire a 3-5 round burst on the center of the target.

NOTE

EACH NUMBER (3 TO 10) ON THE ELEVATION SCALE STANDS FOR 100 METERS.

THE MARKS BELOW “3” ON THE RIGHT HAND SCALE ARE

500, 700 AND 900 METERS RESPECTIVELY.

2-24



NOTEEACH CLICK OF THE WINDAGE KNOB (FRONT KNOB) MOVES THE SIGHT 1/2MIL, AND THE GROUP ON THE TARGET;

6 INCHES (15.24 CENTIMETERS) AT 300 METERS10 INCHES (25.4 CENTIMETERS) AT 500 METERS.

Make windage and elevation corrections as follows:

• To move group right: Turn windage knob (front knob) counterclockwise (CCW).• To move group to left: Turn windage knob (front knob) clockwise (CW)• To raise the group: Turn peep sight counterclockwise (CCW).• To lower the group: Turn peep sight clockwise (CW).

Fire another group. Repeat above procedures until zeroed.

2-25



NOTE

IF THE WEAPON CANNOT BE ZEROED IN ELEVATION, AND THE PEEP SIGHT IS SCREWED ALL THE WAY IN OR OUT, THE FRONT SIGHT POST CAN BE ADJUSTED UTILIZING THE SPANNER WRENCH.

CENTER YOUR PEEP SIGHT IN ELEVATION AND FIRE A BURST OF 3-5 ROUNDS FOR A SHOT GROUP. RE-ADJUST AS REQUIRED UNTIL DESIRED ZERO IS OBTAINED.

2-26


NOTE RE-ZEROING WEAPON MAY BE REQUIRED WHEN GUNNER HAS PROBLEM ZEROING WEAPON FOR ELEVATION. ONLY ADJUST FRONT SIGHT IN WINDAGE OR ELEVATION IF WEAPON CANNOT BE ZEROED BY THE ADJUSTMENTS ON THE REAR SIGHT ASSEMBLY.

FRONT SIGHT ELEVATION ADJUSTMENT: Install Wrench, Spanner through hole in top of Front Sight housing with notched grooveinserted over flats of Front Sight Post. To raise the impact group, screw the Sight postdown clockwise (CW). To lower the impact group, screw the Sight post upcounterclockwise (CCW).

NOTE EACH ½ TURN OF THE SIGHT POST IS EQUAL TO 1 MIL OF ELEVATION. EACHMIL OF ELEVATION MOVES THE GROUP ON THE TARGET APPROXIMATELY30CM (12 INCHES) AT 300 METERS.

CW CCW

2-27

2.6 FIELD ZERO, FRONT SIGHT


NOTE

EACH CLICK = 0.5 MIL OF MOVEMENT

SIGHT BASEPIN LOCATOR

KNURLED KNOB

GAS BLOCK HOUSING

NOTE

REZEROING WEAPON MAY BE REQUIRED WHEN GUNNER HAS PROBLEM ZEROINGWEAPON FOR WINDAGE.

FRONT SIGHT WINDAGE ADJUSTMENT:

Ensure Knurled Knob is screwed back to clear Gas Block Housing. Install Adjusting Tool on Sight Base, Knurled Knob on left side of barrel. Insert Pin, Locator into spring pin cavity. Screw Knurled Knob until tension is felt against Gas Block Housing. Turn Knurled Knob (CW) against Gas Block Housing and listen for clicks, Sight Base will move to the left.

2.6 FIELD ZERO, FRONT SIGHT (cont)

2-28


2.6 FIELD ZERO, FRONT SIGHT (cont)

Ensure Knurled Knob is screwed back to clear Gas Block Housing. Install AdjustingTool on Sight Base on right side of barrel. Insert Pin, Locator into spring pin cavity.Screw Knurled Knob until tension is felt against Gas Block Housing. Turn KnurledKnob (CW) against Gas Block Housing and Listen for clicks, Sight Base will move to theright.

NOTEEACH CLICK = 0.5 MIL OF MOVEMENT

KNURLED KNOB

SIGHT BASE

GAS BLOCK HOUSING

PIN LOCATOR

SPRING PIN CAVITY(not shown)

2-29


2.7 CONFIRMATION OF BATTLEFIELD ZERO

Field Expedient Zeroing Distances Elevation Setting One ½ Turn Equals 25.4 meters (1000 inch) 300 2.54 cm (1 inch) 10 meters (10.94 yards) 700 1 cm (0.4 inch) 300 meters 300 30 cm (12 inches)

2-30


2.8 IMMEDIATE ACTION

If the weapon stops firing, take immediate action. Charge weapon and push cockinghandle forward until you hear it click.

If a round is ejected – FIRE AGAIN.

COCKING HANDLE

2-31


2.8 IMMEDIATE ACTION (cont)

WARNINGIF NOTHING IS EJECTED AND BARREL IS HOT (200 ROUNDS FIRED WITHIN A 2MINUTE PERIOD); DO NOT OPEN THE COVER, PUSH SAFETY TO RIGHT (REDBAND NOT VISIBLE). KEEP WEAPON POINTED DOWN RANGE, AND REMAINCLEAR FOR 15 MINUTES. AFTER 15 MINUTES, CLEAR YOUR WEAPON.

SAFETY

If nothing is ejected, look to see if any rounds remain on the feed tray assembly. If not,you have run out of ammunition. If the barrel is not hot, clear the weapon.

2-32


2.9 IF IMMEDIATE ACTION DOES NOT WORK

Be sure weapon is cleared.Check for:

• Obstructions• Lubrication• Dirt• Damaged Parts

Take corrective actionas required.

Reload, and fire again.

2-33


2.10 STUCK CARTRIDGE CASE OR LIVE ROUND

WARNINGSTAY CLEAR OF MUZZLE. DO NOT ALLOW ROUND TO HIT ANY HARDSURFACE OR IT MAY FIRE. DISPOSE OF LIVE ROUND ACCORDINGLY.

SAFETY

If it did fire and didn’t extract, you have a stuck cartridge case. If weapon can becharged, do so, push safety to right (RED BAND not visible). Remove barrel.

2-34


2-35

2.10 STUCK CARTRIDGE CASE OR LIVE ROUND (cont)

NOTEIF YOU ARE UNABLE TO CHARGE THE WEAPON, BOLT MAY BE STUCK IN BARREL EXTENSION.

WARNINGIF YOU TRY TO CHARGE THE WEAPON AND THE COCKING HANDLE WILL NOT UNLOCK THEBOLT. PERFORM THE FOLLOWING STEPS:• KEEP MUZZLE POINTED DOWN RANGE.• PLACE CHARGING HANDLE AGAINST A SOLID OBJECT AND APPLY CONSTANT FORWARD

PRESSURE TO MOVE COCKING HANDLE REARWARD TO UNLOCK.NOTE

• DO NOT USE YOUR FOOT OR OTHER HEAVY OBJECTS TO FORCE CHARGING HANDLE TOTHE REAR AS THIS CAN CAUSE DAMAGE TO THE WEAPON OR HARM TO THE OPERATOR.

• BARREL MUST BE REMOVED TO PERFORM STUCK CARTRIDGE CASE REMOVAL.

CLEANING 30" ROD

STUCK CARTRIDGE

Insert Cleaning Rod 30” through muzzle end of barrel, use of Obstruction Remover is optional.Gently tap out stuck cartridge case.


2.10 STUCK CARTRIDGE CASE OR LIVE ROUND (cont)

RED BAND

SAFETY

If it didn’t fire and didn’t extract, you have a stuck live round. If weapon can be charged, do so.

Push safety to left (RED BAND visible). Pull trigger; if it still doesn’t fire, wait until barrel is cool (approximately 15 min). If weapon can be charged, do so, and push safety to right (RED BAND not visible). Remove barrel.

2-36


2-37

2.10 STUCK CARTRIDGE CASE OR LIVE ROUND (cont)NOTE

IF YOU ARE UNABLE TO CHARGE THE WEAPON, BOLT MAY BE STUCK IN BARREL EXTENSION.WARNING

IF YOU TRY TO CHARGE THE WEAPON AND THE COCKING HANDLE WILL NOT UNLOCK THEBOLT. PERFORM THE FOLLOWING STEPS:• KEEP MUZZLE POINTED DOWN RANGE.• PLACE CHARGING HANDLE AGAINST A SOLID OBJECT AND APPLY CONSTANT FORWARD

PRESSURE TO MOVE COCKING HANDLE REARWARD TO UNLOCK.NOTE

• DO NOT USE YOUR FOOT OR OTHER HEAVY OBJECTS TO FORCE CHARGING HANDLE TO THEREAR AS THIS CAN CAUSE DAMAGE TO THE WEAPON OR HARM TO THE OPERATOR.

• BARREL MUST BE REMOVED TO PERFORM LIVE ROUND REMOVAL.OBSTRUCTION REMOVER

CLEANING 30" ROD

STUCK LIVE ROUNDAssemble cleaning rod (30”) with Obstruction Remover. Insert through muzzle end of barrel.Gently tap out live round.The weapon must be treated as though it has a live round in the chamber if the bolt is locked and itcannot be charged. If you experience this condition, forward to unit armorer for corrective action.


2.11 RUNAWAY MACHINE GUN

If runaway occurs (weapon won’t stop firing), take action to correct it quickly.

WARNINGSTAY CLEAR OF MUZZLE AND ALWAYS KEEP WEAPON POINTED

DOWNRANGE.

Take either of the following actions:

1. Let weapon continue firing if near end of belt.2. Grab cocking handle (palm up), pull all the way back and hold. Push safety to right

(RED BAND not visible); raise cover, remove link belt.3. Twist belted ammunition or break links.

WARNINGNEVER RELOAD A RUNAWAY WEAPON UNTIL IT IS REPAIRED.

BE SURE WEAPON IS CLEARED.

Forward to unit armorer for corrective action.

2-38


2.12 BARREL ASSEMBLYNOTE

WHEN THE BARREL IS REMOVED OR INSTALLED THE BOLT MUST BE LOCKED TO THE REAR WITH THE SAFETY PUSHED TO THE RIGHT

(RED BAND NOT VISIBLE).

REMOVE:

Clear weapon. Charge weapon and lock operating group to the rear, push the safety to the right (RED BAND Not Visible). Point muzzle downward, depress barrel locking lever with left hand and lift the barrel out by the carrying handle. Return operating group to forward position.

WARNING

DO NOT TOUCH

HOT BARREL(S)

BARREL LOCKING

LEVER

2-39


2.13 BIPOD POSITIONING AND STOWAGE

To fold the bipod rearward, hold the two legs together and bring them up under thebarrel. When released they will lock into bipod stowed position.

Positioning of Legs for Stowage

2-40


2.13 BIPOD POSITIONING AND STOWAGE (cont)

To operate the weapon from the bipod, push down on either legs to rotate to the verticalposition. To return the Bipod to the stowed position, squeeze legs together and rotate legsupward toward the receiver.To extend Bipod Leg pull downward. To retract Bipod Leg depress Bipod Latch whilepushing leg upward. Each leg is adjustable to 3 different lengths.

BIPOD LATCH (one each side)

2-41


2.14 ACCESSORY

2.14.1 STOCK ASSEMBLY, COLLAPSIBLETo shorten the overall length of the weapon, pull back on buttplate, twist to the left(counterclockwise), and push buttplate fully forward.

Extended Position Closed Position

2-42


2.14 ACCESSORY (cont)

2.14.1 STOCK ASSEMBLY, COLLAPSABLE (cont)

When shoulder rest firing is required, pull shoulder rest to the rear and up. Shoulder rest is securewhen it snaps into notches at the top of the buttstock.

SHOULDER REST

2-43


2.14 ACCESSORY (cont)2.14.2 100 ROUND ASSAULT MAGAZINE

NOTE

THE FOLLOWING INSTRUCTIONS ARE FOR LOADING TWO REUSABLE

100 ROUND MAGAZINES.

1. With canvas up, unzip 100 round magazine, remove the reusable plastic feed strap and attached link packed inside (these are spares and should be kept for future use). Note the silhouette of a cartridge on the inside of the plastic.

2. Remove 200 round ammo belt from disposable container. Determine the center point of the belt (holding the loose ends together) and by twisting, separate it into two belts of approximately equal length.

100 ROUND ASSAULT MAGAZINE

100 ROUND SEMI RIGID ASSAULT PACK2-44



2.14.2 100 ROUND ASSAULT MAGAZINE (cont)

3. By twisting, remove the plastic feed strap and first link from the first cartridge. Withthe cartridges pointing as the silhouette depicts, insert several rounds from the insideof the magazine through the feed opening (the first cartridge will have no open linkloops). Turn the magazine, plastic up, check for proper cartridge position as thesilhouette depicts, and reattach the feed strap and link to the first cartridge.

4. Using moderate pressure to overcome the spring force, push belt back into magazineuntil the feed strap seats into the feed opening.

5. Turn magazine canvas up and fold the ammo belt back and forth so that it fits insidethe magazine, close the zipper, and secure the snap on the zipper pull.

2-45



2.14.2 100 ROUND ASSAULT MAGAZINE (cont)

6. The reusable 100 round magazine is now ready for use and for attachment to theweapon.

7. To load the second magazine, repeat step one.

8. With the cartridges pointing as the silhouette depicts, insert several rounds from theinside of the magazine through the feed opening (the first cartridge will have no openlink loops). Turn the magazine, plastic up, and attach the supplied feed strap and linkto the first cartridge.

9. Follow the procedures in steps four and five above.

10. After use, save feed strap and attached link for future use.

2-46



2.14.3 BLANK FIRING ATTACHMENT (BFA)

WARNINGUSE ONLY BLANK M200 AMMUNITION WITH THE BFA.

DO NOT FIRE BLANK AMMUNTION TOWARD PERSONNELWITHIN 20 FEET OF THE MUZZLE.

CAUTIONDO NOT USE TOOLS TO TIGHTEN ATTACHMENT,

HAND TIGHTEN ONLY.

2-47


2.14 ACCESSORY (cont)2.14.3 BLANK FIRING ATTACHMENT (BFA) (cont)

2- Hook in forward groove of compensator

1- Unscrew the restrictor tube and slide it all the way back.

3- Insert resistor tube into the muzzle end of compensator. Screw in resistor tube until contact is made. Hand tighten.

2-48


2.14 ACCESSORY (cont)2.14.3 BLANK FIRING ATTACHMENT (BFA) (cont)

NOTEAFTER EVERY 50 ROUNDS, CHECK TO SEE IF BFA IS STILL TIGHT.

WARNINGBEWARE BFA RING COULD BE “HOT”

• Thoroughly clean your weapon and Blank Firing Attachment (BFA) after each firingexercise. Blank ammunition builds up carbon faster than live ammunition.

• To ensure continued / proper weapon function, it is conceivable that thoroughcleaning may be necessary after firing each 500 rounds.

• If necessary, clean weapon before firing blank rounds.• Use of BFA “Rate of Fire” goes up approximately 100 rounds per minute.

2-49


2.14 ACCESSORY (cont)2.14.4 BLANK FIRING BARREL (BFB)

• Thoroughly clean your weapon and Blank Firing Barrel (BFB) after each firing

exercise. Blank ammunition builds up carbon faster than live ammunition. • To ensure continued / proper weapon function, it is conceivable that thorough

cleaning may be necessary after firing each 500 rounds. • If necessary, clean weapon before firing blank rounds.

2-50



2.14.5 SOUND SUPPRESSOR (SOPMOD)

NOTE THE RATE OF FIRE WILL INCREASE TO APPROXIMATELY 900 ROUNDS PER MINUTE. THE WEAPON AND SUPPRESSOR SHALL BE CLEANED AFTER EVERY 1000 ROUNDS.

CAUTION DO NOT EXCEED SUSTAINED FIRING RATE OF 85 RDS/MIN WITH SUPPRESSOR ATTACHED. IF EXCEEDED, DAMAGE TO SUPPRESSOR WILL RESULT. THE SUPPRESSOR MUST BE COOLED TO AMBIENT TEMPERATURE AFTER EVERY 200 ROUNDS FIRED AT THE 85 RDS/MIN RATE.

Refer to Special Operations Peculiar Modifications Accessories Kit ST-23-31-1 and heed all WARNINGS, CAUTIONS, AND NOTES pertaining to the use and maintenance of Sound Suppressor. See Appendix B.

2-51



2.14.5 SOUND SUPPRESSOR (SOPMOD) (cont)

RETAINING RING

LATCH PLATE

RETAINING RING

LATCH PLATE

UNLOCKED POSITION LOCKED POSITION

2-52


2-53

Section III. OPERATION UNDER UNUSUAL CONDITIONS

2.15 ENVIRONMENT/WEATHER (Protective Measures)

NOTESEE LUBRICATION GUIDE.


2.15 ENVIRONMENT/WEATHER (Protective Measures) (cont)

WARNINGWITH AMMUNITION AND WEAPON EXPOSED TO THE SUN ON A HOT SUNNY DAY

COOK-OFF CAN OCCUR WITH 50 ROUNDS OF CONTINUOUS FIRING.

Do not remove linked ammunition from the 200 round container. Operation with free hanginglinked ammunition will allow water, sand, dirt, mud, snow and ice to enter the weapon,causing feed problems.Be sure weapon covers, such as the link ejection port cover, are closed when weapon is not inoperation. This will prevent sand, dirt, mud and snow from entering the weapon.

Keep weapon covered when possible. This will prevent sand, dirt, snow and water fromaccumulating.

CAUTIONTO AVOID DAMAGE TO EQUIPMENT, DO NOT USE DRY CLEANING SOLVENT ON

PLASTIC COMPONENTS, SEALED BUFFERS, ETC..

During unusual conditions, it may be necessary to periodically flush out sand, mud and otherdebris from areas like the trigger assembly that you are not authorized to disassemble.

2-54


2.15 ENVIRONMENTAL/WEATHER (Protective Measures) (cont)

2.15.1 EXPOSURE TO WATER-MUD

WARNINGENSURE BARREL IS NOT OBSTRUCTED BY WATER OR MUD.

Disassemble, clean, lightly lubricate and assemble as soon as possible. Make sure it is dry before lubricating. Generously lubricate external surface.

2.15.2 HOT-WET/SALT AIR

Inspect more frequently for signs of rust. Keep gun as moisture-free as possible. Clear and lubricate as necessary to preserve the metal and prevent rust. Use a generous second coat of lubrication on external surfaces for extra protection.

2-55


2.15 ENVIRONMENTAL/WEATHER (Protective Measures) (cont)

2.15.3 HOT - DRY - SAND - DUST

NOTEDO NOT LUBRICATE THE EXTERIOR METAL SURFACES,

AS THIS WILL ONLY COLLECT DUST AND SAND.

Clean in enclosed areas when possible, away from blowing sand and dust. Clean and lubricate only moving parts. Extreme heat dries up lubricant. Clean and lubricate more frequently.

2.15.4 COLD - ICE – SNOW

If possible, thoroughly clean, dry and lubricate the weapon in a warm dry place. If weapon is brought indoors, keep it away from direct heat. Exercise weapon and lubricate daily to help prevent corrosion If metal "sweats" dry and lubricate parts before taking weapon outdoors. Apply a

light second coat of lubrication to provide protection.

2-56


CLP - Grade 2 is used for all temperatures.

Lightly Lubricate - a film of oil barely visible to the eye.

Generously Lubricate - Heavy enough so that it can be spread

with finger.

CHAPTER 3MAINTENANCE INSTRUCTIONS

Section I. LUBRICATION INSTRUCTIONS

3.1 LUBRICATION GUIDE

Cleaner, Lubricant, and Preservative (CLP) is the only lubricant to use on yourweapon.Remember to remove excessive lubricant from the bore before firing.

3-1


3.1 LUBRICATION GUIDE (cont)

NOTE CLP WILL PROVIDE REQUIRED LUBRICATION AT TEMPERATURES BETWEEN 0°F AND -35°F (-19°C AND - 37°C).

HOWEVER, IF 1/2 OZ. BOTTLE IS STOWED WHERE TEMPERATURES REACH 0°F (-19°C) OR LOWER, BOTTLE BECOMES RIGID AND HARD TO DISPENSE CLP. Disassemble, clean, lubricate, and reassemble as required.

3-2


Section II. TROUBLESHOOTING PROCEDURES

3.2 TROUBLESHOOTING

a. The table lists the common malfunctions which may occur during the operation ormaintenance of the weapon or its components. Perform the tests/inspections andcorrective actions in the order listed.

b. This manual cannot list all malfunctions that may occur, nor all tests or inspections

and corrective actions. If a malfunction is not listed or is not corrected by listed -corrective actions, forward to unit armorer for corrective action.

3-3


3.2 TROUBLESHOOTING (cont)

TROUBLESHOOTING TABLE

MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. Sluggish Operation Dirty receiver Clean and lubricate

Lack of lubricants LubricateCarbon buildup in gas system Clean gas block, piston and

gas cylinder 2. Failure to feed Insufficient lubrication Lubricate as required

Defective ammunition links Remove defective ammunition, installnew ammunition

Obstruction in receiver Remove obstructionInsufficient gas pressure Clean gas block, piston and

gas cylinderUnlatched cover Latch cover

3-4


3.2 TROUBLESHOOTING (cont)MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION

2. Failure to feed (cont.) Long/short rounds Align rounds in link beltInverted link belt Reinstall link belt with open end of

link facing downDamaged, weak or wornoperating parts

Forward to unit armorer for correctiveaction

3. Double feed Dirty ammunition or chamberBroken extractor/spring

Clean ammunition and /or chamber

Forward to unit armorer for correctiveaction

SPRING(not shown)

EXTRACTOR

3-5


3-6

MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 4. Failure to chamber Dirty ammunition Clean ammunition

Carbon build up in gas system Clean gas block, piston and gascylinder. If problem still exists,forward to unit armorer forcorrective action

Carbon build up in receiver Clean receiverDamaged round Remove round and recharge

weaponDamaged or weakened helical compressionspring (driving)

Forward to unit armorer forcorrective action

HELICAL COMPRESSION SPRING(DRIVING)




MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION

Dirty chamberDamaged gas block

Clean chamberForward to unit armorer forcorrective action

4. Failure to chamber(cont)

5. Failure to fire Push safety left(RED BAND visible)

Safety on

SAFETY

RED BAND

3-7




5. Failure to fire (cont) Remove and install link beltproperly.

Link belt improperly loaded

LINKED BELT

Faulty Ammunition Eject round, Replaceammunition.

3-8




5. Failure to fire (cont) Forward to unit armorer forcorrective action.

Broken or damaged firing pin

Broken or weakened helicalcompression spring (driving)

Forward to unit armorer forcorrective action.

HELICAL COMPRESSION SPRING

(DRIVING)

3-9


3.2 TROUBLESHOOTING (cont.)


Inspect for stuck cartridge case6. Failure to extract Follow instructions in Chapter 2,Section II of this manual.

Dirty chamber/bolt and slide assembly

Clean chamber and/or clean boltand slide assembly. If problemstill exists forward to unit armorerfor corrective action.

Clean gas block, piston and gascylinder.

Forward to unit armorer forcorrective action.

SPRING(not shown)

EXTRACTOR

Carbon build up in gas system

Damaged extractor/spring

3-10




7. Failure to eject Clean and lubricate bolt and slide assembly. If problemstill exists forward to unitarmorer for corrective action.

Short recoil

Damaged ejector/spring Forward to unit armorerfor corrective action.

Carbon build up in gas system Clean gas block piston and gascylinder.

EJECTOR

3-11




Defective round in chamber.

Bolt and slide assembly not forwardand locked

8. Stops firing Eject round.

Remove obstruction or clean and lubricate as required.

LOCKED

UNLOCKED

Primer indented but not fired Eject round. If this occurs morethen once; Faulty ammunition orworn firing pin may cause it.Forward to unit armorer forcorrective action.

3-12




Sticking feed mechanism.8. Stops firing (cont) Clean and lubricate feed mechanism. If problem stillexists forward to unit armorerfor corrective action.

Carbon buildup in gas system Clean gas block, piston andgas cylinder. If problem stillexist, forward to unit armorerfor corrective action.

Short recoil


Clean gas block, bolt and piston assembly. Lubricate bolt. If problem still exists forward to unit armorer for corrective action.

Bolt jammed in barrel socket

3-13


3.2 TROUBLESHOOTING (cont.)


9. Failure to cock orrunaway weapon.


Broken, worn or burred sear.

Piston assembly sear notch worn Forward to unit armorerfor corrective action.

NOTCHES

3-14




9. Failure to cock orrunaway weapon(cont).

Sear stuck in trigger housing

Short recoil.

Carbon buildup in gas system.


Clean and lubricate bolt andslide assembly.

Clean gas block, piston andgas assembly.

10. Failure to Lock in open blot position

Clean and lubricate safety andor replace.

Safety fails to slide properly

3-15


SECTION III – MAINTENANCE PROCEDURES

3.3 FIELD STRIPPING (Disassembly)

3.3.1 Sling & Snap Hook Assembly:

Removal:Squeeze the latch on snaphooks and remove hooks from buttstock, and forward area of receiver.

LATCHLATCH

3-16


3.3 FIELD STRIP (Disassembly) (cont)

3.3.2 Cover, Feed Mechanism, Assembly:Squeeze cover latches inward, raise cover until it engages cover latch, to remain in open position.

3-17



3.3.3 Buttstock w/Hydraulic Buffer:WARNING

ENSURE MOVING PART COMPONENTS ARE IN FORWARD POSITION,THIS MINIMIZES SPRING TENSION

Removal:Pull the upper retaining pin at rear of receiver to the left. Removal may be easier bydepressing the locking spring tip on the right side of the receiver. The lower pin may beremoved in a similar manner. Remove the buttstock assembly by pulling it rearwardwhile supporting trigger mechanism once both pins have been disengaged.

UPPER RETAINING PIN LOWER

PIN

3-18



3.3.4 Trigger Assembly:

WARNINGNEVER REMOVE TRIGGER MECHANISM BEFORE WEAPON IS CLEARED.

REMOVAL OF THE TRIGGER MECHANISM FROM LOADED WEAPON WILLCAUSE A RUNAWAY.

ENSURE MOVING PART COMPONENTS ARE IN FORWARD POSITION,THIS MINIMIZES SPRING TENSION

Removal:Pull trigger assembly down and rearward

.

3-19



3.3.5 Drive Spring & Return Rod Transfer Mechanism:WARNING

ENSURE MOVING PART COMPONENTS ARE IN THE FORWARD POSITION,THIS MINIMIZES SPRING TENSION.

Removal:Push in and up on the return rod transfer mechanism and remove. Separate drive spring fromreturn rod.

3-20


3.3.6 Moving Parts (Operating Rod, Slide Assembly & Bolt Assembly):

Removal:Pull the cocking handle rearward. Slide the moving parts rearward and out of receiver. Rotatethe bolt clockwise to disengage the lug and pull it out of the slide assembly. To separate slideassembly from the piston assembly, press the retaining pin to the left using cleaning rod sectionand lift off the slide assembly. Return cocking handle to forward position.


3-21



3.3.7 Barrel Assembly:

Removal:Depress barrel locking level with left hand and lift the barrel out by the carrying handle.

BARREL LOCKING LEVER

Carrying Handle

3-22


3.3 FIELD STRIP (Disassembly) (cont)3.3.8 Gas Cylinder Assembly:

Removal:Grasp knurled end, turn left or right to release the locking spring and pull out

3-23


3.3 FIELD STRIP (Disassembly) (cont)3.3.9 Bipod Assembly:

Removal:Slide Bipod Assembly off the receiver boss.

3-24


3.4 CLEANING, INSPECTION AND REPAIR

WARNINGUSING GASOLINE, KEROSENE, HYDRAULIC OIL, BENZENE, BENSOLHIGH-PRESSURE WATER, STEAM FOR CLEANING IS PROHIBITED.

CAUTIONDO NOT USE ABRASIVES TO CLEAN THE BORE, PISTON, GAS CYLINDER

OR GAS BLOCK.

NOTEDO NOT REMOVE EXTRACTOR COMPONENTS DURING CLEANING

3-25


3.4 CLEANING, INSPECTION AND REPAIR (cont)

1. Softpak Cleaning Kit (includes items specified on Appendix B).2. Scraper Assembly.3. Wrench, Spanner.

3

1

2

3-26



CAUTIONDO NOT LUBRICATE GAS BLOCK ON BARREL.

DO NOT USE ABRASIVES TO CLEAN GAS BLOCK, BORE AND CHAMBER.

BORE AND CHAMBER

GAS BLOCK REGULATOR

3-27



CAUTIONBE SURE TO CLEAN YOUR BARREL BORE FROM THE CHAMBER END WITH BARREL

REMOVED FROM WEAPON.

1. Inspect bore and chamber.

2. Wipe outside of barrel with a lightly lubricated rag.

3. If heavy carbon deposits are present in the bore, chamber, gas block, and compensator,clean with bore brush/chamber brush and scraper assembly.

4. Inspect for cracks, dents, burrs or other damage on compensator, barrel extension,and barrel release lever. Check front sight for looseness, if loose forward to unitarmorer for corrective action.

3-28


3.4 CLEANING, INSPECTION AND REPAIR (cont)NOTE

USE CARE WHEN CLEANING THE COVER AND FEED MECHANISM TO AVOIDKNOCKING THE SPRINGS OUT.

5. Check cover feed mechanism for smooth operation, spring tension,bent parts or excessive wear.

CLP - Lightly lubricate moving parts.

CLP, FEED LEVER

CLP, COCKING HANDLE

CLP, FEED PAWLS

CLP COVER PIN

CLP, COVER LATCHES

3-29



CLP, COCKING HANDLE GUIDES

CLP, RAILSEJECTOR,

SPRING CLP

6. Check for bends and cracks, free movement of cocking assembly and excessively worn, burred or chipped rails. Check barrel locking latch and cover detent springs for spring tension. Lightly lubricate all rails. Check ejector and ejector spring for free movement, lightly lubricate spring.

3-30


3-31

HOLDING LUGS

CLP

TRIPPING LEVERCLP SEAR

CLP

TRIGGER

SAFETYCLP

PISTOL GRIP

7. Check for broken pistol grip and chipped or cracked trigger housing holding lug.Forward to unit armorer for corrective action if problem exists.

8. Check tripping lever and sear for burrs, cracks, chips and wear.Forward to unit armorer for corrective action if problem exists.

9. Check cocking action by pushing back on tripping lever, sear will rise. Pull trigger, sear will lower. Push back on tripping lever.10. Check safety function. When safety is pushed to right (RED BAND not visible), pull

trigger, sear will not lower. When safety is pushed to left (RED BAND visible) pulltrigger, sear will lower.

11. CLP - Lightly lubricate tripping lever and sear surfaces, ends of trigger pin, safetyshaft and sear pivot pin.



3-32

CAUTIONDO NOT LUBRICATE PISTON OR BOLT FACE

SLIDE ASSEMBLYCLP

TRANSFER MECHANISMCLP

BOLTCLPBOLT FACE

NO CLP

FIRING PINCLP ROLLER

CLP

DRIVING SPRINGCLP

PISTONNO CLP OPERATING ROD ASSEMBLY CLP

12. Check slide assembly, bolt assembly, piston assembly, and return rod and transfermechanism assembly for burrs, cracks or broken pins. Push down on roller of slideassembly to make sure it will retract. Check driving spring for broken strands.Forward to unit armorer for corrective action if more than one broken strand is foundon same coil or if more than two strands are broken regardless of location on entirespring.

13. CLP – Lightly lubricate driving spring, return rod and transfer mechanism assembly,bolt assembly, piston assembly, slide assembly, moving parts, polished areas, firingpin and roller.




14. Clean and check Bipod Assembly, for operation; CLP - lightly lubricate. Forward to unit armorer for corrective action if problem exists.

3-33



15. Clean and check the rear sight assembly for windage and elevation; CLP - lightlylubricate. If rear sight does not function properly, forward to unit armorer forcorrective action.

CLP

ELEVATION

WINDAGE

CLP

3-34


3.4 CLEANING, INSPECTION AND REPAIR (cont)CAUTION

DO NOT LUBRICATE CHROME AREA OF GAS BLOCK

16. Gas Block:Clean the front of gas block on barrel by inserting tip of scraper into inside diameter androtate handle. Move forward until blade engages gas block groove, rotate back and forth.Remove Scraper from inside diameter and with tip inserted into grooves, rotate back andforth under barrel diameter.(10 to 2 o’clock position) until grooves are clean.

TIP TIP

3-35


17. Gas Cylinder:Clean the inner most internal groove of the gas cylinder by inserting and rotating the flatside of the scraper in the hole.


3-36



CAUTIONDO NOT LUBRICATE INTERIOR OF GAS CYLINDER

17. Gas Cylinder (cont):Clean the outer most internal groove of the gas cylinder by inserting and rotating the flat side ofthe scraper in the hole.Lightly lubricate exterior of gas cylinder only.

3-37



18. Piston:The grooves of the piston will be cleaned as shown.Squeeze and rotate.

(Typical cleaning of one of three grooves.)

3-38



CAUTIONDO NOT LUBRICATE INTERIOR OR EXTERIOR PISTON.

18. Piston (cont):Clean the hole on the front of piston with the scraper as shown below.Lightly lubricate piston rod, but not the piston.

PISTON

3-39



19. Rail Adapter:

Remove; 11 - Rib, Rail, Cover.

Inspect for loose or missing screws, 3 each side.Replace or tighten as required with 1/8 hex Allen wrench.

SCREWS

3-40



3-41


3.5 FIELD STRIP (Assembly)

NOTETHE RECEIVER AND BIPOD LEGS SHOULD BE POSITIONED AS SHOWN BELOW

3.5.1 Bipod Assembly:

Place the bipod on the forward area of receiver.

3-42


3.5 FIELD STRIP (Assembly) (cont)

3.5.2 Gas Cylinder Assembly:With weapon in vertical position, push the gas cylinder through the bipod yoke into thereceiver.

Push the cylinder to the rear while countering the pressure of the locking spring andguiding the end of the cylinder into receiver with the other hand applying downwardpressure.

Turn the cylinder until the spring clickinto the recess at the rear of the gas cylinder

3-43



3.5.3 Barrel Assembly, Fluted:Lay barrel bushing of barrel on top of receiver and slide rearward (the carrying handlemay be used for this purpose), while aligning gas block, depress barrel latch, install intoreceiver opening and release latch. Ensure barrel is positively latched.

3-44



3.5.4 Moving Parts (Operating Rod, Slide Assembly & Bolt Assembly):

Assemble the slide assembly to the piston assembly, and secure by pushing retaining pinfrom left to right.

RETAINING PIN

3-45



3.5.4 Moving Parts (Operating Rod, Slide Assembly & Bolt Assembly) (cont):NOTE

BE SURE FIRING PIN SPRING IS ON FIRING PIN

Put the bolt assembly into the slide assembly.Press in to compress the firing pin spring,rotate the bolt and hook its driving lug into theslide assembly.

3-46



3-47

WARNINGENSURE CHARGING HANDLE IS ALL THE WAY FORWARD

CAUTIONENSURE BOLT LUGS AND SLIDE CUTOUTS ARE PROPERLY ALIGNED

ON RECEIVER GUIDES

3.5.4 Moving Parts (Operating Rod, Slide Assembly & Bolt Assembly) (cont):

Put the moving parts into the receiver with the feed cover open. Locate the bolt lugs andslide cutouts carefully on the rails. At the same time locate the piston into the rear of thegas cylinder.



3.5.5 Drive Spring & Return Rod Transfer Mechanism:

CAUTIONIMPROPER ASSEMBLY OF THE TRANSFER MECHANISM CAN CAUSE DAMAGETO THE RECEIVER AND/OR THE ASSEMBLY ITSELF. IF THE HORIZONTAL PINSOF THE TRANSFER ASSEMBLY ARE NOT PLACED ON THE HOOKS, INSIDE THERECEIVER, WHEN THE BUTTSTOCK IS PIVOTED IN THE UP POSITION FORPINNING, THE RECEIVER HOOKS CAN BEND. IF THE HORIZONTAL PINS OFTHE TRANSFER ASSEMBLY ARE ROTATED TO A VERTICAL POSITION AND THEBOTTOM PIN IS HOOKED INTO THE LIGHTENING HOLE IN THE BOTTOM OFTHE RECEIVER, THE PIN CAN BE SHEARED, DAMAGED OR LOST WHEN THEWEAPON IS FIRED.

3-48



3.5.5 Drive Spring & Return Rod Transfer Mechanism (cont):

NOTEENSURE THAT THE HEADED END OF VERTICAL PIN, IN THE

TRANSFER MECHANISM ASSEMBLY, IS UP (on top)

While rotating in either direction, slide spring on return rod and transfer mechanismassembly:

Push the return rod and transfermechanism assembly into its housingin the rear of the piston. Pressin and down on the rear of the assemblyuntil its two protruding pins are positioned inthe receiver grooves

PROTRUDING PINS(BOTH SIDES)

HEADED PIN

3-49



3.5.6 Trigger Assembly:NOTE

ENSURE RETAINING PIN IS TO THE LEFT

Install trigger assembly mechanism onto support and receiver, rotate upward and hold inplace (rear mounting hole).

3-50



3.5.7 Buttstock Assembly w/Hydraulic Buffer:

WARNINGWHEN THE LOWER PIN (PIVOT) RETENTION IS NOT POSITIVELY RETAINED ITCAN WORK LOOSE DURING FIRING. IF IT WORKS COMPLETELY OUT, THETRIGGER MECHANISM CAN SEPARATE FROM WEAPON. SEPARATION OF THETRIGGER MECHANISM WHEN THE WEAPON IS LOADED, WILL CREATE ARUNAWAY WEAPON.

Push lower pivot pin through one side of trigger frame. Insert buttstock assembly andpush lower pivot pin completely to the right. Rotate buttstock assembly upward and pushupper retaining pin to right to secure.

If positive retention does not exist with both grooves of the lower pivot pin and upperretaining pin forward to unit armorer for corrective action.

3-51



3.5.7 Buttstock Assembly w/Hydraulic Buffer (cont):

LOWER RETAINING PIN

UPPER RETAINING

PIN

3-52



3.5.8 Cover, Feed Mechanism Assembly:Depress barrel locking lever. Pull cover downward and lightly slam cover latch intoreceiver. Ensure proper latching.

BARREL LOCKING LEVER

3-53



3.5.9 Sling & Snap Hook Assembly:Squeeze the latch on the snap hook and install hook in loop of buttstock assemblyand in opening at forward end of receiver.

LATCH

LATCH

3-54


3.6 FUNCTION CHECK

• Assure the safety is to the left (RED BAND visible) and charge the weapon by pulling thecocking handle to the rear to lock the bolt (cock the weapon). Push cocking handle forwarduntil you hear it click.

• Push safety to the right (RED BAND not visible).• Open cover assembly and place link belt of several rounds of M199 dummy ammunition on

feed tray with first round against cartridge stop.• Pull the trigger nothing should happen.• Push safety to the left (RED BAND visible) and pull the trigger. The bolt assembly should

move forward, stripping, feeding and locking a dummy round (M199) in the chamber.• Pull cocking handle to rear. Dummy round (M199) should extract and eject and the bolt

assembly should remain to rear.• Repeat the cycle several times. Each time the cycle is repeated, a link should exit the cover

assembly.• With bolt assembly held to the rear, check for clear weapon. Hold cocking handle to rear, pull

the trigger and ride the bolt assembly forward to close and lock on empty chamber.• If for any reason the weapon fails the function test, check for missing or improperly

assembled components. If the reason for failure cannot be detected forward to unit armorerfor corrective action.

3-55


THIS PAGE IS INTENTIONALLY LEFT BLANK

3-56


CHAPTER 4MAINTENANCE OF AUXILARY EQUIPMENT

Section I. AUXILARY EQUIPMENT

4.1 BLANK FIRING ATTACHMENT (BFA)

Clean frequently using CLP. If BFA becomes cracked or distorted, replace.

4.2 STOCK ASSEMBLY, COLLAPSIBLE (Accessory)

If collapsible buttstock is damaged or does not function correctly, forward to unitarmorer for corrective action for repair.

4.3 MAGAZINE, CARTRIDGE (100 Rd)

Inspect magazine for missing parts, broken zipper; torn cloth; Deformed feed lips;cracked top; deformed, cracked or broken dovetail; and bent or loosen spring catch.If magazine does not function properly or cannot be retained in weapon dovetail,forward to unit armorer for corrective action.

4-1


4-2

4.4 ACCESSORY KIT COMPONENTS (SOPMOD)

SOPMOD items identified for authorized use with MK46 MOD 1 Machine Gun,for maintenance refer to Special Operations Peculiar Modifications Accessories Kit ST23-31-1.

As applicable; (See Appendix B)• SCOPE, DAY, OPTICAL• HANDGRIP FORWARD• SIGHT, REFLEX• AN/PEQ-2 (ITPIAL) SYSTEM• AN/PEQ-5 VISIBLE LASER POINTER• MINI NIGHT VISION SIGHT (AN/PVS-17A)• SOUND SUPPRESSOR• 11 - RIB RAIL COVERS

NOTEALL WARNINGS, CAUTIONS, NOTES IN KIT ST 23-31-1 ARE APPLICABLE

TO USAGE WITH MK46 MOD 1


CHAPTER 5AMMUNITION

WARNING

DO NOT FIRE:

Seriously corroded ammunitionDented cartridgesCartridges with loose bulletsCartridges exposed to extreme heat (direct sunlight on a hot day) until they have cooledCartridges with pushed in (short) bullets

CAUTIONIF AMMUNITION IS WET OR DIRTY, WIPE IT OFF WITH A DRY RAG PRIOR TO USE.DUST AND OTHER ABRASIVES THAT COLLECT ON OILY AMMUNITION AREDAMAGING TO OPERATING PARTS OF THE WEAPON.DO NOT LUBRICATE. LUBRICATED CARTRIDGES PRODUCE EXCESSIVE CHAMBERPRESSURE.

5-1


Use only authorized ammunition that is manufactured to U.S. specifications

KEEP DRY, CLEAN, AND FREE OF “CRUD”. YOUR LIFE DEPENDS ON IT!

WARNINGBLANK AMMUNITION SHOULD NOT BE FIRED TOWARD PERSONNEL

WITHIN 20 FEET OR LESS FROM THE MUZZLE, BECAUSE FRAGMENTSOF A CLOSURE WAD OR PARTICLES OF UNBURNED PROPELLANT

MIGHT INFLICT INJURY WITHIN THAT RANGE.DO NOT LUBRICATE AMMUNITION UNDER ANY CIRCUMSTANCES!

ALL PERSONNEL WITHIN 20 FEET OF A WEAPON FIRING SHALL WEARAPPROVED SINGLE HEARING DEVICES DURING TRAINING EXERCISES!

5-2


APPENDIX ABASIC ISSUE ITEMS LIST

Section I. INTRODUCTION

SCOPEThis appendix lists the basic issue (BII) for the MK46 MOD1 Machine Gun to help youinventory items required for safe and effective operation.

GENERAL

The BII lists is described as follows:

A-1


GENERAL (cont.) BII These are the minimum essential items required to place the MK46 MOD1 Machine Gun in operation, to operate it and to perform emergency repairs. Although shipped separatelypackaged, BII must be with the MK46 MOD1 Machine Gun during operation and whenever it is transferred between property accounts. The illustrations will assist you inidentifying the items. This manual is your authority to request/requisition replacementBII, based on TOA authorization of the end item. The following provides an explanation of columns found in the tabular listing: Column (1) - Illustration Number (Illus. No.). This column indicates the number of theillustration in which the item is shown. Column (2) - National Stock Number. Indicates the national stock number (NSN) assigned to the item and will be used for requisitioning purposes.

A-2


GENERAL (cont.)

Column (3) - Description CAGEC and Part No. Indicates the Federal item name and,if required a minimum description to identify and locate the item. The last line for eachitem indicates the Commercial and Government Entity Code (CAGEC) followed by thepart number.

Column (4) - Unit of Issue (U/I). Indicates how the item is issued for the NSN shown incolumn two.

Column (5) - Quantity required (Qty Req). Indicates the quantity of the itemauthorized to be used with/on the equipment

A-3


14

1B

3

1A

2

6

5

SECTION II. BASIC ISSUE ITEMS

56

5 7

5

8

A-4


SECTION II. BASIC ISSUE ITEMS

(1) ILLUS.

NUMBER

(2) NATIONAL

STOCK

(3) DESCRIPTION, CAGEC &

PART NO.

(4) U / I

(5) QTY REQ.

1 1005-01-448-8513 SOFTPAK CLEANING KIT (01VS3) 223M16

INCLUDES:

EA 1

1A 5110-01-485-1405 SCRAPER ASSEMBLY (3S679) 46055

EA 1

1B 5120-01-141-3839 WRENCH, SPANNER (19200) 9350033

EA 1

2 NONE MANUAL OPERATORS (3S679) SW-360-AG-MMO-012

EA 1

3 1005-01-485-1409 FRONT SIGHT ADJUSTING TOOL (3S679) 46070

EA *

4 1005-21-912-8997 BLANK FIRING ATTACHMENT (BFA)

(19200) 12598135

EA 1

* one (1) for every four (4) weapons

A-5


SECTION II. BASIC ITEMS OF ISSUE (1)

ILLUS. NUMBER

(2) NATIONAL

STOCK


PART NO.

(4) U / I

(5) QTY REQ.

5 NONE

5340-01-158-0134

1005-00-312-7177

SLING & SNAP HOOK ASSY. (19200) 9348467

COMPOSED OF: SNAP HOOKS

(19200) 9348468 SLING PADDED ADJUSTABLE

(19200) 12002983

EA

EA

1

1

6 NONE BARREL ASSEMBLY (SPARE) (3S679) 46121

EA 1

7 1005-00-791-5420 CARRYING CASE, BARREL (19200) 7791009

EA

1

8 NONE EXTENSION, STRAP (3S679) 49244

EA 1

A-6


APPENDIX BADDITIONAL AUTHORIZATION LIST

SECTION I. INTRODUCTION

SCOPE.This appendix lists additional items you are authorized for the support of theMK46 MOD1 Machine Gun.

GENERAL.This list identifies items that do not have to accompany the MK46 MOD1 Machine Gun and thatdo not have to be turned in with it. These items are all authorized to you by TOA.

EXPLANATION OF LISTINGNational stock numbers, descriptions and quantities are provided to help you identify and requestthe additional items you require to support this equipment. The items are listed in alphabeticalsequence by item name under the type document (i.e., TOA which authorizes the item(s) to you.)

B-1


EXPLANATION OF COLUMNS.

Column (1) - National Stock Number. Indicates the national stock number (NSN) assignedto the item and will be used for requisitioning purposes.

Column (2) - Description CAGEC and Part Number. Indicates the Federal item nameand if required, a minimum description to identify and locate the item. The last line for each itemindicates the Commercial and Government Entity Code (CAGEC), in parenthesis, followed bythe part number.

Column (3) - Unit of issue (U/I). Indicates how the item is issued for the NSN shown incolumn one.

Column (4) - Quantity Required (Qty Req). Indicates the quantity of the item authorized tobe used with/on equipment.

B-2


SECTION II ADDITIONAL AUTHORIZED LIST (1)

NATIONAL STOCK


PART NO.

(3) U / I

(4) QTY REQ.

NONE SCRAPER ASSEMBLY (3S679) 46055

EA 1

1005-01-334-1507 MAGAZINE, CARTRIDGE (100 RD)

(19200) 12944203

EA 2

NONE

NONE

NONE

NONE

NONE

STOCK ASSEMBLY, COLLAPSIBLE (3S679) 46060

BLANK FIRING BARREL (BFB) (N00164) 1005-LL-L99-7749

ASSAULT PACK, 100 RND 5.56MM (SEMI RIGID) (3S679) PN 46098 LOAD BEARING EQUIPMENT

POUCH (3S679) PN 46130 STRAP, FEEDER MK46 5.56MM

NATO (3S679) PN 46097

EA

EA

EA

EA

EA

1

1

6

6

20

B-3


SECTION II ADDITIONAL AUTHORIZED LIST (cont.)

(1)NATIONAL

STOCK

(2)DESCRIPTION, CAGEC &

PART NO.

(3)U / I

(4)QTYREQ.

1005-01-448-8513 SOFTPAK CLEANING KIT(01VS3) 223M16

EA 1

CONSISTS OF:1005-01-449-9683 CASE, SOFTPAK

(01VS3) 911-7EA 1

1005-01-449-9257 PATCHES(01VS3) 921

EA 10

1005-01-449-8934 ROD, CLEANING 30”(01VS3) C-30-5

EA 1

1005-01-445-6003 ROD, CLEANING 8”(01VS3) C-6

EA 1

1005-01-445-6799 BRUSH, SHORT(01VS3) 324K

EA 1

1010-01-445-6797 SCRAPER(01VS3) 206K

EA 1

B-4


SECTION II ADDITIONAL AUTHORIZED LIST (cont.)(1)

NATIONALSTOCK

(2)DESCRIPTION, CAGEC & PART

NO.

(3)U / I

(4)QTYREQ.

1005-01-449-8928 BRUSH(01VS3) 318-5

EA 1

1005-01-449-8902 HANDLE “T”(01VS3) 01-5

EA 1

1005-01-449-9315 TIP, SLOTTED BRASS(01VS3) 202-5

EA 1

1005-01-449-9672 REMOVER, OBSTRUCTION(01VS3) 104-5

EA 1

1005-01-449-9943 PICK(01VS3) 100-39-5

EA 1

1005-01-445-6798 BRUSH, LENS(01VS3) 3762

EA 1

NONE LENS CLEANINGSOLUTION & CLOTH

(01VS3) 240-4

EA 1

1005-01-445-5889 HANDLE, ROD(01VS3) 9098

EA 1

B-5


SECTION II ADDITIONAL AUTHORIZED LIST (cont.) (SOPMOD)

(1)NATIONAL

STOCK


PART NO.

(3)U / I

(4)QTYREQ.

1240-01-412-6608 SCOPE, DAY, OPTICAL(0FL29) MODEL TA01M4A1

EA 1

1005-01-416-1091 HANDGRIP, FORWARD(1S002) 95122

EA 1

1240-01-435-1916 SIGHT, REFLEX(0FL29) RX01M4A1

EA 1

5855-01-422-5253 AN/PEQ-2 (ITPIAL) SYSTEM(0B107) ITP-001

EA 1

5860-01-439-5409 AN/PEQ-5 VISIBLE LASERPOINTER(0B107) CVL-001

EA 1

5855-01-474-8904 MINI NIGHT VISION SIGHTAN/PVS-17A(55311) 242970-004

EA 1

1005-01-437-0324 SOUND SUPPRESSOR(1S002) 96062

EA 1

B-6


SECTION II ADDITIONAL AUTHORIZED LIST (cont.) (SOPMOD)

(1)NATIONAL

STOCK


PART NO.

(3)U / I

(4)QTYREQ.

1005-01-453-4228 2 RIB RAIL COVER(19200) 12973138

EA 1

1005-01-453-4223 4 RIB RAIL COVER(19200) 12973137

EA 1

1005-01-453-4221 5 RIB RAIL COVER(19200) 12973136

EA 1

1005-01-453-4222 6 RIB RAIL COVER(19200) 12973135

EA 1

1005-01-453-5383 9 RIB RAIL COVER(19200) 12973134

EA 1

1005-01-453-5386 11 RIB RAIL COVER(19200) 12973132

EA 1

B-7


THIS PAGE IS INTENTIONALLY LEFT BLANK

B-8


APPENDIX C EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST

SECTION I. INTRODUCTION

SCOPE. This appendix lists expendable/durable supplies and materials you will need to operate and maintain the MK46 MOD1 Machine Gun. These items are authorized to you byTOA. EXPLANATION OF COLUMNS. Column (1) - Level. This column identifies the lowest level of maintenance that requiresthe listed items (e.g., "C- OPERATOR/CREW").

C-1


EXPLANATION OF COLUMNS (cont.)

Column (2) - National Stock Number. This is the National stock number assigned tothe item; use it to request or requisition the item.

Column (3) - Description CAGEC & Part Number. Indicates the Federal item nameand if required, a description to identify the item. The last line for each item indicates theCommercial and Government Entity Code (CAGEC), in parenthesis, followed by the partnumber.

Column (4) - Unit of Measure (U/M). Indicates the measure used in performing theactual maintenance function. If the unit of measure differs from the unit of issue,requisition the lowest unit of issue that will satisfy your requirements.

C-2


C-3

SECTION II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST

(1)LEVEL

(2)NATIONAL STOCK

NO.

(3)DESCRIPTION CAGEC &

PART NO.

(4)U/M

C

C

C

9150-01-102-1473

9150-01-079-6124

9920-00-292-9946

CLEANER, LUBRICANT ANDPRESERVATIVE (CLP)(81349) MIL-L-634601/2 OZ BTL

CLEANER, LUBRICANT ANDPRESERVATIVE (CLP)(81349) MIL-L-634604 OZ BTL

CLEANER, TOBACCO PIPE(89855) DILLSPIPECLEANER

EA

EA

EA


SECTION II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST(cont.)

(1)LEVEL

(2)NATIONAL STOCK

NO.

(3)DESCRIPTION CAGEC & PART

NO.

(4)U/M

C 7920-00-205-1711 RAG, WIPING; COTTON(58536) A-A-53150 lb. bdl.

EA

C 1005-00-912-4248 SWAB, SMALL ARMSCLEANING; COTTON(19204) 11686408

EA

C-4


THE METRIC SYSTEM AND EQUIVALENTS LINEAR MEASURE

LIQUID MEASURE1 Milliliter = 0.001 Liters =0.0338 Fluid Ounces

Centimeter 10 Millimeters = 0.01 meters = 0.3937 inches TemperaturesMeter 100 Centimeters = 1000 Millimeters = 39.37 inches 212°F = 100 °C°Kilometer 1000 Meters = 0.621 Miles 100°F = 38°CMillimeters Inches times 25.4 32°F = 0°CInches Millimeters divided by 25.4 0°F = - 18°C

-35°F = -37°CWEIGHTS1 Gram = 0.001 Kilogram = 1000 milligrams = 0.035 Ounces1 Kilogram = 1000 Grams = 2.2lb.

APPROXIMATE CONVERSION FACTORSTO CHANGE TO MULTIPLY BYInches Centimeters 2.540Feet Meters 0.305Yards Meters 0.914Miles Kilometers 1.609Fluid Ounces Millimeters 29.573Ounces Gram 28.349Pounds Kilograms 0.454Centimeters Inches 0.394Meters Feet 3.280Meters Yards 1.094Kilometers Miles 0.621Milliliters Fluid Ounces 0.034Grams Ounces 0.035Kilograms Pounds 2.205° Fahrenheit ° Celsius °C = (°F - 32) x 5 ÷ 9° Celsius ° Fahrenheit ° F =(°C x 9 ÷ 5) +32

Documents

Sw360-Ag-mmo-012 5.56mm Lightweight Machine Gun,Mk46 Mod 1 Feb. 2006