MODEL XF50 - 50 BMG RIFLE

MODEL XF50 - 50 BMG RIFLE

Owner’s Manual

READ BEFORE USE!

2

CONTENTS

Page 2 Table of Contents

Page 3 Use of Manual/Safety

Page 6 Disassembly

Page 8 Trouble Shooting

Page 9 Warranty Information

Page 10 Parts Breakdown

ALWAYS USE EYE AND EAR PROTECTION!

Shooter AND Spectators

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USE OF THIS MANUAL

Before you handle the XF50, read this manual completely. It is important that you understand how to handle a

gun safely and the unique features of this product. This manual does not substitute for training from a qualified

instructor. Important safety topics are discussed in this chapter and throughout this manual. This manual

should stay with the rifle and it should be transferred with the rifle to subsequent owners. It will be replaced at

no cost by contacting the manufacturer.

This manual covers all variants of the XF50. Technical specifications are subject to change without notice.

SAFETY GUIDELINES

WARNING: Failure to follow safety guidelines may cause injury or death.

Ammunition

Valley Ordnance Works LLC. does not recommend the use of hand loaded, remanufactured or surplus

ammunition. The use of clean, dry and properly stored commercially manufactured ammunition will preserve

your warranty. Valley Ordnance Works LLC does not recommend the use of Military Surplus ammunition due

to high pressures that may be caused by aged powders.

We do not recommend the use of Incendiary (Blue Tip) rounds or API (Silver Tip – Armor Piercing Incendiary

) rounds as they have a tendency to start fires, (that’s what incendiary means….). AP (Black Tip - Armor

Piercing) - rounds can penetrate several feet of dirt, large trees and even steel plate over 1”thick. USE

CAUTION!!!!

Safety distance

The .50 BMG cartridges are made the same as an ordinary center fire rifle cartridge. Bullets fired from this rifle

could travel as far as 5 miles. Make sure you have an adequate backstop!

Ear protection

Hearing loss is permanent. Hearing loss from gunfire is cumulative, but the noise from even one shot may

cause permanent hearing loss. Wear both ear plugs and muffs while shooting. It is also your responsibility to

protect the hearing of those around you.

Muzzle Brake

The muzzle brake is essential to the design of your rifle and diverts a large portion of a shot’s blast rearward

and to the side of the muzzle. Your rifle must not be fired without it. People and objects should not be in the

area of the muzzle brake because its blast consists of high pressure, high temperature gas. All spectators should

use double hearing protection as well. The safest place for a spectator is directly behind the shooter. Shooting

SLAP (Saboted ammo) with a muzzle brake installed may cause severe injury or death! Firing your rifle

without the muzzle brake will subject your rifle and its accessories to damaging recoil. It could also cause the

shooter to be injured.

Eye Protection

Eye protection should be worn when shooting as well as when maintaining your rifle. It is normal for firing to

kick up airborne dust and debris. Glasses also protect you from scopes during recoil. Protect your eyes from

solvents and uncontained parts under spring pressure while doing maintenance on your rifle.

4

Assume every gun is loaded

Treat every gun s if it were loaded, until you personally prove otherwise. Do not trust your memory and do not

take anyone else’s word for it. Always look and feel for a empty chamber. DO NOT trust that the extractor

provides an empty chamber.

Beware of Barrel Obstructions

Be sure the barrel’s bore is free of obstructions before you fire your rifle. Even the smallest obstruction such as

a part of a patch, or even grease, will cause dangerously increased pressures that can rupture the barrel.

Muzzle Control

Always keep the muzzle pointed in a safe direction. Do not point your muzzle at anything that you do not

intend to shoot.

Keep your finger off the trigger

Keep your finger off the trigger and out of the trigger guard until your sights are aligned on your target and you

intend to shoot.

Identify your target and backstop

Before you pull the trigger, make sure of your target and what is beyond it. The rifle should never be fired at

surfaces where bullets are likely to stray off in unpredictable directions.

Maintain your rifle properly

Performing proper maintenance, as outlined in this manual, insures that your rifle will be safe to shoot and will

perform to design specifications for many years. Alterations, modifications or adjustments may damage your

rifle, make it unsafe to fire and will void warranty claims.

Alcohol, medications and drugs

Do not handle or operate your rifle under the influence of alcohol, medication or drugs.

5

Shooting and Recoil Management

The most common question we get is “how bad is the recoil?” We answer the question with this statement – It

depends upon your technique. If fired properly your XF50 will have a similar recoil to a 12 gage Duck load.

Here are some suggestions to help make your shooting experience more pleasant!

A) NEVER fire the XF50 without your muzzle brake! – The muzzle break will reduce the recoil

by 2/3!

B) Make sure you pull the stock firmly into your shoulder. This step cannot be stressed enough!

This is the single biggest thing you can do to help manage recoil.

C) Shoot sitting at a bench if possible. Lean forward into the rifle. Shooting prone does not allow

your body to recoil with the rifle so you absorb much more than if sitting.

D) Use a good stock and recoil pad. We do not recommend the use of the M4 style collapsible

stocks (because they can COLLAPSE!) We recommend the Magpul brand PRS stock, the Ace

ARFX stock or the Mil-spec A2 stock. A Slip over recoil pad (such as the Decelerator™ Brand)

further reduce the recoil of the rifle

E) We do not recommend letting children fire the rifle. (They don’t have the same body mass to

absorb recoil that adults do)

F) Use a recoil absorbing rest such as the Caldwell “Lead Sled”

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Disassembly

1) Remove rear takedown pin

2) Shotgun open upper from lower

3) Retract bolt assembly

7

4) Using 7/16 wrench remove bolt handle

5) Remove bolt tube from rear of receiver and bolt head from side of receiver

6) Stripped bolt assembly shown

8

Trouble Shooting

A) Failure to fire

Failure to fire is usually caused by shooting old or defective ammunition. We highly recommend the use of only

high quality factory loaded ammunition.

In the event of a failure to fire, Wait 2 MINUTES before opening the bolt handle. This is a precaution against

hang fires (the slow ignition of a cartridge). If the round does not fire, We suggest removing the rear pin of the

receiver and re-cocking the hammer (WHILE KEEPING THE MUZZLE POINTED DOWN RANGE.) Re-

assemble the upper and re-try. If round does not fire on second try, carefully open the bolt after waiting an

additional 2 minutes and extract the round. Inspect the primer to see if it is dimpled. If the primer has been

struck dispose of the cartridge in a safe manner. If the primer has not been struck it is most likely caused by the

failure to re-cock the hammer by cycling the bolt handle all the way to the rear. In the event that the primer was

struck lightly, you may try to re-fire the round. It is possible that the primer is seated to deeply in the primer

pocket.

B) Stuck Bolt/Round

Our Extractor design is extremely robust. And will stand up to a good deal of abuse. That said it is NOT a

license to attack your rifle with a heavy blunt object! In the event of a stuck case we recommend the use of a 3/8

dia birch dowel or ONE PIECE cleaning rod (DO NOT use screw together type rod) placed down the bore to

gently tap the case loose from the chamber. (DO NOT Attempt to remove a UNFIRED / LIVE round this way)

In case of a stuck live round, safely take to a competent gunsmith to have the round removed

Shooting 50BMG Ammo is not like shooting regular center fire ammo. There is so much area to the case that a

higher pressure round may become stuck. This is a main reason to avoid reloads or surplus ammo. If you

experience a stuck round carefully inspect the fired case for pressure signs (ie, bulged primer, bulged case, case

separation, or primer ejection) If you find evidence of pressure carefully inspect your upper before using again.

C) Binding of bolt during operation

There is a distinct method to open and close the bolt on your upper. Due to the integrated cam on the bolt lugs,

and extractor cam in the receiver. You MUST lift the bolt handle all the way vertical into the extractor cam arc

at the top of the receiver. This should be done with a fluid motion and will provide the force necessary to “crack

loose” a 50BMG Case.

9

Warranty and Service

Valley Ordnance Works LLC warrants that this firearm was manufactured free of defects in materials and

workmanship. For Five years from the date of purchase by the original owner, Valley Ordnance Works LLC

agrees to correct any defect in this firearm for the original purchaser by repair or replacement with the same or

comparable model. Due to ATF regulations, Returns of transferred (sold) firearms are NOT permitted under

ANY circumstances.

Valley Ordnance Works LLC will not be responsible for injury, death, or damage to property resulting from

either intentional or accidental discharge of this firearm or from its function when used for purposes or

subjected to treatment for which it was not designed. Valley Ordnance Works LLC will not honor claims

involving this firearm which result from careless or improper handling, unauthorized adjustments or parts

replacement, corrosion, neglect, the use of the wrong caliber ammunition, or the use of other than commercially

manufactured ammunition in good condition, or any combination thereof. Valley Ordnance Works LLC will

not honor claims involving this firearm when such claims are made by the second or subsequent owner.

If you need factory service, whether made under warranty or not, please contact Valley Ordnance Works LLC

for instructions on how to have your gun repaired.

Third party warranty claims shall be handled by the purchaser thru the manufacturer of said items. (i.e. Bipod,

Optics, Recoil management devices, etc.)

Valley Ordnance Works LLC

24654 N. Lake Pleasant Pkwy

Suite 103 – Box 198

Peoria, AZ 85383

(800) 804-6473

www.valleyordnance.com

Your responsibility

Your XF50 is well-engineered and manufactured to the highest standards. It was proof-fired and carefully

inspected before it was packaged and shipped from our shop. Its safe use depends on you alone. You are the

ultimate safety device. Much like other mechanical devices, such as electric power tools, gas-powered

equipments, and cars, your rifle is safe unless handled in an irresponsible or uneducated manner.

http://www.bohicaarms.com/

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ITEM NO. PART NUMBER DESCRIPTION QTY.

1 XF50-102 UPPER ASSEMBLY 1

2 XF50-103 LOWER ASSEMBLY 1

3 SCOPE RING ASSBY USER SUPPLIED 2

4 SCOPE USER SUPPLIED 1

DO NOT SCALE DRAWING

XF50-104SHEET 1 OF 1

UNLESS OTHERWISE SPECIFIED:

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INTERPRET GEOMETRICTOLERANCING PER:

DIMENSIONS ARE IN INCHESTOLERANCES:FRACTIONALANGULAR: MACH BEND TWO PLACE DECIMAL THREE PLACE DECIMAL

ANSI Y14.5M

.005.01

1/641° 3°

AFINAL ASSEMBLY

HEAT TREAT

24654 N. LAKE PLEASANT PKWY.BLDG 103 - BAY 198 - PEORIA, AZ 85383

(800) 804-6473 FAX (623) 399-1015

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89

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ITEM NO.

PART NUMBER DESCRIPTION QTY.

1 XF50-015 BILLET LOWER 12 BS-09 BUFFER TUBE 13 LR-28 TRIG/HAMMER PIN 24 LR-20 TRIGGER 15 LR-08 SELECTOR 16 LR-33K HAMMER 17 LR-15 TAKEDOWN DETENT 28 LR-27 SELECTOR DETENT 19 LR-26 SPRING, SELECTOR 1

10 LR-14 SPRING, TAKEDOWN 211 LR-25 PISTOL GRIP 112 XF50-017 STOCK 113 LR-30 REAR TAKEDOWN PIN 114 LR-18 FRRONT PIVOT PIN 115 LR-22 SPRING, TRIGGER 116 WOLF XP-HS SPRING, HAMMER 117 91251A441 1/4-28 X 7/8 SHCS 118 91792A559 1/4-28 X 3/4 SCREW 119 95584A207 1/4 STAR WASHER 1




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ANSI Y14.5M

.005.01

1/641° 3°

A

LOWER RECEIVERASSEMBLY

HEAT TREAT


(800) 804-6473 FAX (623) 399-1015

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FASTENERS OMITTED FOR CLARITYITEM NO. PART NUMBER DESCRIPTION QTY.

1 XF50-001 UPPER RECEIVER 1

2 XF50-004 PICATINNY RAIL 1

3 XF50-003 BARREL NUT 1

4 XF50-002-1 BARREL 1

5 XF50-006 MUZZLE BRAKE 1

6 XF50-101 BOLT ASSEMBLY 1

7 XF50-005 HANDGUARD 1

8 XF50-016 HANDGUARD CLAMP 1

10 MCM91251A344 10-32 X 5/8 SHCS 5

11 MCM91251A194 8-32 X 1/2 SHCS 1

12 MCM91253A001 10-32 X 3/8 FHCS 2




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ANSI Y14.5M

.005.01

1/641° 3°

AUPPER ASSEMBLY

HEAT TREAT


(800) 804-6473 FAX (623) 399-1015

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ITEM NO. PART # DESCRIPTION QTY.

1 XF50-007 BOLT TUBE 1

2 XF50-008 BOLT PLUG 1

3 XF50-100 BOLT HEAD ASSEMBLY 1

4 XF50-014 BOLT HANDLE 1




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ANSI Y14.5M

.005.01

1/641° 3°

ABOLT ASSEMBLY

HEAT TREAT


(800) 804-6473 FAX (623) 399-1015

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ITEM NO. PART# DISCRIPTION QTY

1 XF50-009 BOLT HEAD 1

2 XF50-011 EXTRACTOR 1

3 XF50-012 EJECTOR 1

4 LC024A05 SPRING, EJECTOR 1

5 MCM92373A145 3/32 X 5/8 SPRING PIN 1

6 LC024A03 SPRING, EXTRACTOR 1

7 MCM9528K13 EXTRACTOR DETENT 1

8 LC018A-01M SPRING, CAM DETENT 1

9 MCM9528K11 DETENT, CAM RING 1

10 MCM98985A221 CAM PIN 1

11 XF50-013 FIRING PIN 1

12 LC026DE-06M SPRING, DEBOUNCE 1

13 XF50-010 CAM RING 1




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ANSI Y14.5M

.005.01

1/641° 3°

A

BOLT HEADASSEMBLY

HEAT TREAT


(800) 804-6473 FAX (623) 399-1015

Documents

MODEL XF50 - 50 BMG RIFLE