WEAPONS FAMILIARIZATION BRIEFSFC LARKIN

M9 Pistol The M9 pistol is a 9-mm, semiautomatic, magazine-fed, recoil-operated, double-action weapon. It is chambered for the 9-mm cartridge.

COMPONENTSThe major components of the M9 pistol include--a. Slide and Barrel Assembly: Houses the firing pin, striker, and extractor. Cocks the hammer during recoil cycle.b. Recoil Spring and Recoil Spring Guide: Absorbs recoil and returns the slide assembly to its forward position.c. Barrel and Locking Block Assembly M9/Barrel Assembly M11: Houses cartridge for firing, directs projectile, and locks barrel in position during firing.d. Receiver: Supports all major components. Houses action of the pistol through four major components. Controls functioning of the pistol.e. Magazine: Holds cartridges in place for stripping and chambering.

GENERAL DISASSEMBLY OF M9 PISTOLTo disassemble the pistol, perform the following procedures:a. Clear and unload the pistol.b. Depress the slide stop and let the slide go forward.c. Hold the pistol in your right hand with the muzzle slightly raised.d. Press the disassembly lever button with your forefinger.e. With your thumb, rotate the disassembly lever downward until it stops.f. Pull the slide and barrel assembly forward and remove it from the receiver.g. Carefully and lightly compress the recoil spring and spring guide. At the sametime, lift up and remove them. Allow the recoil spring to stretch slowly.h. Separate the recoil spring from the spring guide.i. While pushing the barrel forward slightly, push in on the locking block plunger.j. Lift and remove the locking block and barrel assembly from the slide.

M4 Carbine • Description:

Lightweight, gas-operated, air-cooled, magazine-fed shoulder fired weapon that can be fired in either semi-automatic or three round burst mode.

Characteristics

Elevation KnobWindage Knob

Carrying Handle

Rear Sight Assembly

Forward Assist Assembly

Buttstock AssemblyTrigger

Bayonet Lug

SlingMagazine Catch Assembly

Ejection Port Cover

Charging Handle

Front Sight Assembly

Handguards

Characteristics

Compensator

Front Sight Post

Slip RingSelector Lever

Bolt Catch

• Remove Sling

• Remove Handguards if possible depending on variant.

• Remove Upper and Lower Receiver

• Remove Bolt Carrier group and Bolt

• Remove Charging Handle

• Disassemble Bolt Carrier group Remove Firing Pin Retaining Pin Remove Firing Pin Bolt Cam Pin Remove Bolt

• Remove Buffer and Buffer Spring

M4 Disassembly

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• Replace Buffer and Buffer Spring

• Assemble Bolt Carrier Group Replace Bolt Replace Bolt Cam Pin Replace Firing Pin Replace Firing Pin Retaining Pin

• Replace Charging Handle

• Replace Bolt Carrier Group

• Attach Upper Receiver to Lower Receiver

• Replace Handguards

• Attach Sling

M4 Assembly

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M249 SAWThe M249 machine gun is a gas-operated, air-cooled, belt- or magazine-fed, automatic weapon that fires from the open-bolt position (Figure 1-1). Its maximum rate of fire is 850 rounds per minute. Ammunition feeds into the weapon from a 200-round ammunition box containing a disintegrating, metallic, split-link belt. Only in emergencies do M249 gunners use a 20- or 30-round M16 rifle magazine, in part because this increases the chance of stoppages. The gunner can fire the versatile M249 machine gun from the shoulder, hip, or underarm; with a bipod; or with a tripod.

Figure 1-1. M249 machine gun, bipod and tripod mounted.

COMPONENTS

This is the M249 components and their purposes. The item numbers in the table correspond to the callout numbers in the figure.

Components Purposes1. Barrel assembly……….Houses cartridges for fire; directs the projectile; supports gas regulator.2. Heat shield assembly..........Protects the hand from the hot barrel.3. Rear sight assembly............Adjusts for windage and elevation.4. Cover and feed mechanism assemblyFeeds linked, belted ammunition. Positions and holds cartridgesin position for stripping, feeding, and chambering.5. Feed tray assembly.............Positions belted ammunition for fire.6. Cocking handle assembly……..Moves on a guide rail fixed to the right side of the receiver. Pullsmoving parts rearward.7. Buttstock and buffer assembly…Folding buttplate and shoulder rest enhance aiming and firing.Hydraulic buffer absorbs recoil.8. Bolt assembly……….Feeds, strips, chambers, fires, and extracts round. Powered byprojectile gasses.9. Slide assembly………..Houses firing pin and roller assembly.10. Return rod and transfer mechanism assembly……….Absorbs recoil for bolt and operatingrod assembly at the end of recoil movement.

11. Receiver assembly..............Supports all major components, houses the action, and, by useof cams, controls weapon function.12. Trigger mechanism.............Controls fire. Grip has storage for lubricant.13. Handguard assembly ..........Thermal insulation protects against temperature extremes;assembly houses cleaning equipment.14. Sling and snap hook assembly…………Simplifies carriage of weapon.15. Bipod……….Supports gun in prone position. Legs telescope to three lengths.16. Gas cylinder assembly ........Locks bipod and allows gasses to escape.17. Piston assembly..................Holds bolt and slide assemblies and houses return spring.18. Return spring……….Locks bolt, slide, and piston during counter recoil.

M249 Disassembly

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• Pull the upper retaining pin at the rear of the receiver to the left. Allow the buttstock to pivot downward and place it on a surface to support the weapon for disassembly.

M249 Disassembly

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• Pull the operating rod and spring from the receiver group and separate the parts.

Pull the operating rod and spring from the receiver group and separate the parts.

• Pull the cocking handle to the rear to release the bolt

M249 Disassembly

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• Separation of the operating rod group.

• Remove the barrel from the receiver.

# 1 Press Barrel release

# 2 Lift slightly up on barrel

# 3 Slide Barrel forward

M249 Disassembly

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• Remove the collar.

• Remove the Gas Regulator.

M249 Disassembly

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• Remove of the handguard if present, depends on variant.

• Remove of the buttstock and buffer assembly and Trigger Mechanism.

M249 Disassembly

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• Remove the gas cylinder.

• Remove of the bipod.

M249 Assembly

• Reverse disassembly steps.

M240B The M240B is a general-purpose machine gun. It mounts on a bipod, tripod,

aircraft, or vehicle. It is belt fed, air cooled, gas operated, and fully automatic. It fires from an open bolt. Ammunition feeds from a 100-round bandoleer with disintegrating links. The gas from firing one round provides the energy to fire the next one. Thus, the gun fires automatically as long as it has ammunition and the gunner holds the trigger is held to the rear. As the gun fires, the links separate and eject from the side. Empty cases eject from the bottom.

Components and Purpose1. Barrel assembly… olds the cartridge and directs the projectile. Includes the barrel,flash suppressor, carrying handle, heat shield, front sightassembly, and gas-regulator plug.2. Heat shield…assembly Protects the gunner’s hand from a hot barrel.3. Buttstock and buffer assembly; and buffer and spade-grip assembly…Houses a buffer whose inner spring washers absorb recoil.4. Receiver assembly…Supports all major components (receiver, handguard, bipod, andrear sight assembly) and action; uses cams to control function of weapon.5. Handguard assembly (not shown)…Insulation protects gunner’s hands from heat and cold.6. Cocking handle assembly…Pulls moving parts rearward along a rail fixed to the right side ofthe receiver.7. Trigger housing assembly…Controls fire.8. Sling and snap hooks…Simplifies carrying the weapon.9. Bipod…Supports the M240B barrel in prone position.10. Drive spring rod assembly…Forces the bolt and operating rod assembly back to firing position.11. Bolt and operating rod assembly…Feeds, strips, chambers, fires, extracts, and ejects cartridges using propellant gasses for power.12. Cover assembly…Feeds linked belt, and positions and holds cartridges while thebolt and operating rod assembly strips, feeds, and chambers them. Has a sight mounting rail on the top exterior.13. Feed tray…Guides cartridges into chamber. Slotted top allows air to circulatearound (and thus cool) the barrel.15. Ejection port Guides ejecting cartridges out of the weapon

M240

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M240 Disassembly

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Remove the Buttstock

Remove the Driving Spring Rod Assembly

M240 Disassembly

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Remove the Bolt and Operating Rod Assembly

Remove the Trigger Housing Assembly

M240 Disassembly

Remove the Cover Assembly

M240 Disassembly

Remove the Barrel Assembly

M240 Disassembly

Disassemble the Barrel Assembly

M240 Assembly

• Reverse disassembly steps.

M69 Practice Hand Grenade

HAND GRENADE GRIPPING PROCEDURES

The importance of properly gripping the hand grenade cannot be overemphasized. Soldiers must understand that a grenade not held properly is difficult to arm. Sustainment training is the key to maintaining grip efficiency. Holding the grenade in the throwing hand with the safety lever placed between the first and second joints of the thumb provides safety and throwing efficiency. Gripping procedures differ slightly for right- and left-handed Soldiers. Remember acquire target hold the spoon, pull safety clip off, pull pin, then throw!

Right-handed SoldiersRight-handed Soldiers hold the grenade upright with the pull ring away from thepalm of the throwing hand so that the pull ring can be easily removed by the index ormiddle finger of the free hand (Figure 3-3).

Left-handed SoldiersLeft-handed Soldiers invert the grenade with the fingers and thumb of thethrowing hand positioned in the same manner as by right-handed personnel (Figure 3-4).

Prone-to-standing throwing position

Prone-to-kneeling throwing position

Alternate prone throwing position

• Recommendation– Arrive USMA for competition able to understand

the US Army terminology in order to effectively receive hands-on training from the US Army Reserve Soldiers.

– Any additional questions can be directed to the attached Brigade Tactical Dept LNO.

Questions?

Guidance