Model 98B Operator’s Manual September 15, 2008
USE OF THIS MANUAL Before you handle the Model 98B rifle, read this manual in its entirety. It is important that you understand the principles of safe gun handling in general and the unique features of this rifle. This manual is not a substitute for training from a qualified instructor. Important safety topics are discussed in this chapter and throughout this manual. This manual should remain with the rifle and it should be transferred with the rifle to subsequent owners.
Assume every gun is loaded Until you personally prove otherwise, treat every gun as if it were loaded. Do not trust your memory and do not take anyone else’s word for it. Look and feel for an empty chamber. Do not trust the extractor to provide an empty chamber. Beware of barrel obstructions Ensure the barrel’s bore is free of obstructions before you fire your rifle. Even the smallest obstruction such as a stuck patch or even grease will cause dangerously increased pressures that can rupture the barrel.
Identify your target and backstop Before you pull the trigger, make certain of your target and what is beyond it. The rifle should never be fired at surfaces where bullets are likely to glance off in unpredictable directions. Failure to fire If your rifle fails to fire when you pull the trigger, do not lift the bolt handle to open the action. Keep the rifle pointed toward a safe area and wait 2 minutes. If a hangfire (slow ignition) has occurred, the round will probably fire within two minutes.
WARRANTY AND SERVICE Barrett Firearms Manufacturing Inc. (BFMI), warrants that this firearm was manufactured free of defects in materials and workmanship. For one year from the date of purchase by the original owner, BFMI agrees to correct any defect in this firearm for the original purchaser by repair or replacement with the same or comparable model.
TABLE OF CONTENTS Use of the manual 2 Firearms Safety 2-4 Warranty and service 5 Table of contents 6 Specifications 7 Contents 8 Function 8 Break-in 8 Loading 9-11 Unloading and clearing 12 Disassembly and assembly 13 Major components 13 Disassembly into major components 14-15 Reassembly of major components 15 Removal and disassembly of the firing assembly 16-18 Reassembly of the firing assembly 18 Disassembly and assembly of ejector and extractor 19-22 Adjusting the trigge
SPECIFICATIONS BARRETT MODEL 98B CALIBER .338 Lapua Magnum BARREL LENGTH 27” (68.58 cm) OVERALL LENGTH 49.75” (126.36 cm) WEIGHT 13.5 pounds (6.12 Kg) TWIST RATE 1-10 Right Hand Twist SAFETY Manual Reversible, thumb lever SAFETY RANGE NEEDED 4 miles (estimated) SCOPE RAIL Integral to the receiver M1913 style, 18.125” (46.03 cm) CARRYING CASE LENGTH CARRYING CASE WIDTH CARRYING CASE DEPTH CARRYING CASE WEIGHT 53 inches 16 inches 6 inches 24 pounds Figure 1.
CONTENTS Your Model 98B rifle includes the following: 98B Rifle Watertight and airtight carrying case Operator’s manual 1 Magazine Your rifle may have included a rifle scope, BORS, rings and other optional accessories. It may have also included cleaning fluids and a cleaning kit. The rifle is shipped from the factory fully assembled. (Figure 2.) Figure 2. Fully assembled rifle. (Shown with optional accessories.) FUNCTION The Model 98B is a magazine fed, bolt action rifle.
LOADING 1. With the rifle pointed in a safe direction, lift the bolt handle (Figure 3, Step A) and draw it to the rear of the rifle. (Figure 3, Step B) 2. Rotate the safety lever to the “SAFE” (lever horizontal) position. (Figure 4.) A BOLT HANDLE Lift bolt handle to the up position. Figure 3, Step A.
Figure 4. Safety lever to “SAFE”. 3. Insert a loaded magazine into the rifle. (Figure 5). The magazine inserts into the rifle straight in without hinging. Figure 5. Inserting the magazine. 4. Push the bolt handle forward (Figure 6, Step A.) which will load a cartridge into chamber, and rotate the bolt handle down (Figure 6, Step B), closing the firing chamber.
WARNING Do not attempt to force a cartridge into the chamber by forcing the bolt closed. If the bolt will not close easily, remove the cartridge and examine it for damage or defects. Check the chamber for obstructions. A B Figure 6. Step A and B. Closing the Bolt 5. Rotate the safety to the “FIRE” position (45 degrees). The rifle is now ready to fire. WARNING The shooter must be positioned directly behind the rifle with the recoil pad held firmly against the shoulder.
UNLOADING AND CLEARING 1. Place the rifle in the “SAFE” position. 2. Lift the bolt handle upward and pull it to the rear and eject a chambered cartridge or spent case. 3. Remove the magazine from the rifle by pressing the magazine catch and remove the magazine from the rifle. (Figure 7) A B Figure 7. 4. With the bolt pulled fully to the rear, look into the chamber to make sure that the cartridge or spent case has been removed. Insert a finger into the chamber to verify the empty chamber.
DISASSEMBLY AND ASSEMBLY WARNING Unload and clear the rifle before disassembly. Ensure no live ammunition is present during disassembly or assembly. Caution The bolt handle must be in the up position before the receivers can be unlatched. The rifle may be disassembled into 5 major components.
Disassembly into major components 1. Deploy bipod legs (if equipped) to let the rifle rest on the bipod feet and butt of the rifle or monopod. 2. Raise the bolt handle to the up position. (Figure 9) BOLT HANDLE Up position Figure 9. 3. Depress and hold the receiver latch, located on the underside of the lower receiver just behind the pistol grip. (Figure 10, Step A.) Separate the receiver from the lower receiver. Pivot the receivers apart until the receiver clears the lower receiver.
Figure 10, Step B. 4. Separate the receiver and the lower receiver as shown in Figure 10, Step B. 5. Remove the front assembly pin to separate the receivers. (Figure 11) B A Figure 11. NOTE No further disassembly of the receivers are recommended or necessary for maintenance. Reassembly of major components Major components are assembled in reverse order of disassembly.
Disassembly of the firing assembly NOTE The firing pin assembly must be cocked to enable disassembly of the firing assembly. The firing pin assembly is cocked when the cocking piece is outside of the cam slot. (See Figure 12.) 1. Lift the bolt handle to the up position. Press the receiver latch and separate the receivers (Figures 9-10). Withdraw the firing assembly from the back of the receiver. Figure 12. Cocked firing assembly.
2. Hook the edge of the cocking piece on a hard edge and pull the cocking piece out of the cocking piece shroud exposing the 2 (two) slots in the cocking piece. Insert a coin into either slot to retain the cocking piece in the disassembly position. (Figure 13) Figure 13. WARNING Do not remove the coin from the cocking piece while the firing pin assembly is removed from the bolt tube complete. The firing pin spring is under heavy load. Serious injury can occur if the assembly pin is removed. 3.
4. Using a punch or another pointed object push the bolt pin (Figure 15, Step A), out of the bolt tube complete. Note that the bolt pin is one directional meaning it can only be disassembled or assembled from one direction. Next remove the bolt assembly (Figure 15, Step B), from the bolt complete. Figure 15. NOTE No further disassembly of the firing pin assembly is recommended or necessary for maintenance. Reassembly of the firing assembly Assembly is in the reverse order of its removal.
Disassembly and assembly of ejector and extractor WARNING The ejector is under spring pressure and is held in place by the ejector pin. Wear safety glasses when removing the ejector pin. NOTE Removal and replacement of the ejector pin requires the use of a hammer and a 3/32 pin punch. It is also useful to have a spent casing. NOTE The extractor, ejector and their springs are not likely to fail. If the rifle fails to extract or eject, rule out other causes before attempting this procedure.
Extractor removal 1. Locate the end of the extractor spring. It is located just behind the bolt lugs. (Figure 17) It is a single bent wire. Using a 1/16” punch, gently lift the end of the extractor spring and unwrap it clockwise from the bolt. With the circular part of the spring up and fully out of the slot in the bolt withdraw the spring (Figure 18). Next slide the extractor out of the slot in the bolt. (Figure 19) Figure 17. Figure 18.
Figure 19. Extractor installation The installation of the extractor is in reverse order of its removal. Ensure the end of the spring is in the spring pocket. Ejector installation 1. Place the ejector spring in the ejector spring hole. (Figure 20, step A.) The spring is bi-directional. 2. Place the ejector in the ejector hole. (Figure 20, step B.) Orient the ejector so that the ejector’s pin slot is facing toward the bolt. Figure 20.
3. Hook the rim of an empty case under the extractor. Use the opposite side of the case to force the ejector flush to the bolt face. Looking through the bolt’s ejector pinhole, confirm that the ejector’s pin slot is oriented so that the ejector pinhole is clear. While depressing the ejector with a cartridge case, insert a punch through one side of the ejector pinhole leaving room for the ejector pin to be started from the opposite side.
Adjusting the trigger mechanism Removal of the trigger housing assembly 1. Rotate the safety half way between the stops on the receiver. (Figure 22.) From the opposite side of the lever push and slightly rotate the safety out of the receiver. This may require a flat punch. Figure 22. Removal of the Safety 2. Separate the receiver from the lower receiver as described in the disassembly section of this manual. Disassembly Of Major Components, figures 9-10. 3.
Figure 23. Removal of the trigger housing assembly. Adjusting the sear engagement. Note The factory setting on the trigger is .030” of sear engagement. This is the minimum amount of sear engagement possible. 1. Turn the sear engagement set screw counter clockwise using a 5/64” Allen wrench to the desired sear engagement. One quarter of a turn of the sear engagement screw will equal an increase of .031” of sear engagement. Do not increase the sear engagement more than ¾ of a turn from the factory setting.
Returning the sear engagement to the factory setting of .030”. 1. Insert the safety into the trigger housing. The safety should be oriented so the full diameter of the safety is down. (Figure 25.) Using the 5/64” allen wrench turn the sear engagement screw clockwise until the trigger contacts the bottom of the safety. Then back the screw off slightly and ensure that the safety can still rotate freely in the trigger housing. Figure 25. Return sear engagement to factory setting.
Returning trigger weight to factory settings Warning Adjusting the trigger weight too low may cause an accidental discharge. 1. Loosen the 5/16” jam nut on the trigger weight screw. Turn the trigger weight screw counter clockwise approximately four turns using a 1/16” allen wrench. 2. Pull the trigger and depress the sear. (Figure 27.) turn the trigger weight screw clockwise until the plunger is fully compressed in the trigger weight screw.
Figure 28. Adjusting the over travel. Returning the over travel to the factory specifications 1. Loosen the ¼” brass jam nut. Insert a 5/64” allen wrench into the over travel screw. Look through the hole in the side of the trigger housing and pull the trigger and press down on the sear. Turn the over travel screw counter clockwise and observe the trigger moving away from the sear. Turn the screw clockwise until it locks up the trigger against the sear.
Assembly of the trigger housing assembly into the receiver 1. Insert the trigger housing assembly into the slot in the lower receiver “A”. (Figure 30.) Slide the trigger housing assembly forward and align the front of the trigger housing onto the pin in the receiver “B”. Next align the safety hole in the lower receiver and the hole in the trigger housing. Figure 30. Installation of the trigger housing. 2. Insert the safety into the receiver until it stops on the safety detent.
Figure 31, Installation of the safety. 3. Ensure the bolt handle is in the up position. Close the receivers together. Functional test of trigger Notice Ensure there is no live ammunition present during this test. Warning Physically check the chamber and make sure the rifle is not loaded. 1. With the rifle fully assembled slowly work the action of the rifle and pull the trigger. Next, rapidly lift the bolt handle to the open position then back to closed, and pull the trigger to make sure the trigger reset.
CLEANING AND LUBRICATION WARNING Unload and clear the rifle before cleaning. CAUTION Do not insert cleaning rods through the muzzle. The barrel crown could be damaged which would severely degrade the accuracy of the rifle. CAUTION To protect the rifle from corrosion, the rifle and the interior of the carrying case should be moisture free before the rifle is placed in the carrying case for storage. Cleaning procedure 1. The rifle should be cleaned and lubricated after each shooting session.
TROUBLESHOOTING MALFUNCTION 1. Failure to chamber and lock 2. Failure to fire 3. Failure to extract 4. Failure to eject 5. Very hard recoil REV A CAUSE CORRECTIVE ACTION 1. Damaged cartridge 1. Remove and replace cartridge 2. Dirty or obstructed chamber 2. Clean chamber 1. Faulty ammunition (Primers dented in center of sufficient depth to fire) 1. Replace ammunition 2. Cocking piece shroud not properly installed in bolt 2. Assemble properly 3. Cocking piece is dragging 3.
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Model 98B Parts List 98101-1 98103 98106 98107 98108-1 98109 0B103 98112 98113 98114 0E104 98202 98203 98204 98205 98206 0A206 98207 98210 98211 98214 98215 0A212 98217 98218 98219 0B204 98301 98304 0F104 98307 98308 0G101 0J400 98312 0J401 0B300 REV A Receiver Complete Barrel Complete Barrel Nut Barrel Washer Muzzle Brake Muzzle Brake Nut DP .125 x .375 Front Bolt Guide Rear Bolt Guide LR Accessory Rail FHCS 10-24 x .375 Bolt Extractor Extractor Spring Ejector Ejector Spring RP .093 x .
REV A 34
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P/N 98414 REV A
