OPERATING AND SAFETY INSTRUCTION MANUAL
Contents
1. 1 insert the Cleaning Rod into the muzzle end of the barrel Rod should be long enough so it will protrude from the end of the Upper Receiver and allow you to easily insert Cotton Cleaning Patches into the Patch Holder attachment of the Rod Cleaning Patch should be moistened with CLP or other suitable bore cleaner 2 Pull the Cleaning Rod out from Receiver towards Muzzle 3 Remove the Patch Holder from Rod reinsert rod through barrel from Muzzle end and attach the 50 BMG size Bore Brush Bore diameter of this Rifle is 510 inches 4 Pull the Brush through the Bore and out the Muzzle The Rod should be able to twist as you pull it allowing the Brush to track in the rifling NEVER reverse the direction of the Bore Brush while it is in the Bore Always pull Brush or Patch from Receiver towards Muzzle following the path of the bullet to ensure that any fouling or powder residue is removed Pg 21 CLEANING Continued 5 After the first pull with the Bore Brush remove Brush from Rod reinsert Rod in Muzzle reattach Brush Repeat this process for three or four pulls 6 Send a patch through the Bore occasionally to help clean out the fouling that the brush is getting loose Just replace the Bore Brush with the Patch Holder a wet patch and pull it through Remember to always have the Bore wet with cleaner before trying to pull a brush through Bore cleaning is complete when bore appears bright and shiny and a final Patch c2. WARNINGS CAUTIONS CONTINUED NEVER leave the Rifle cocked and ready to fire as this condition is extremely dangerous and the Rifle could easily discharge causing injury death or damage to property NEVER leave your Rifle unattended someone especially a child may fire it causing injury death or damage to property ALWAYS instruct children and others in your household to respect firearms This rifle is not intended for use by children so DO NOT let anyone underage shoot this rifle A 50 caliber rifle has recoil similar to a 12 Gauge shotgun Even if your underage children use shotguns the air blast created by a 50 caliber round is much more powerful than children can handle ALWAYS keep firearms away from children at all times Keep firearms unloaded and locked in a gun safe when not in use at a firing range SHOOTING CAUTIONS NEVER fire this rifle if your condition or judgment is in any way impaired If you are taking medications seek advice from your doctor to ensure that you are fit to shoot safely ALWAYS use Eye and Ear Protection when using this firearm we recommend using Double Ear Protection while using this rifle ALWAYS keep the Safety lever on Safe when the rifle is loaded and cocked until you are ready to aim at the target and intend to fire ALWAYS keep others clear of the ejection port and muzzle blast area NEVER squeeze the trigger or put your finger in the trigger guard until you are aiming at the target and ready
3. OUTSIDE FRONT COVER Lor BUSHMASTERIBASUPSUJBMUjCalibeghiflest amp TCarbines Part BFI BASOOPMAN VA 1 2008 7 F m Lj A A El PUEASE PRACTICE SAFE FIREARMS HA N DIL ING j WARNING BEFORE USINGiTHIS FIREARM READ AND FOLLOW THESE INS TRUCTIONS r EPUM aS a a OUTSIDE BACK COVER Part BFI BASOOPMAN V 1 1 2008 OPERATING AND SAFETY INSTRUCTION MANUAL NOVI ALWAYS WEAR EAR amp EYE PROTECTION WHEN SHOOTING roS OR ANY RIFLE Bushmaster Firearms International LLC P O Box 1479 999 Roosevelt Trail e Windham Maine 04062 U S A Tel 207 892 3594 Toll Free 1 800 998 7928 Fax 207 892 8068 Customer Service 1 800 883 6229 Web http www bushmaster com E Mail info bushmaster com 2008 Bushmaster Firearms International LLC Windham ME USA All Rights Reserved Made with Pride in the U S A Inside Front Cover N N PLEASE PRACTICE SAFE FIREARMS HANDLING WARNING IF THIS FIREARM IS CARELESSLY OR IMPROPERLY HANDLED UNINTENTIONAL DISCHARGE COULD RESULT AND COULD CAUSE INJURY DEATH OR DAMAGE TO PROPERTY CAUTION CAREFULLY READ THIS INSTRUCTION MANUAL PRIOR TO LOADING AND FIRING THIS FIREARM FOLLOW ALL INSTRUCTIONS ON THE PROPER HANDLING AND SAFE USE OF THIS FIREARM LIVES MAY DEPEND ON IT WARNING USE ONLY CLEAN DRY HIGH QUALITY COMMERCIALLY MANUFACTURED AMMUNITION APPROPRIATE TO THE 50 BMG CALIBER OF THIS FIREARM Ammuni
4. Figure 4 below Then remove the Carrier Pin by pushing it out of the Bolt Carrier BOLT CARRIER LEFT SIDE Figure 4 HEN PUSH CARRIER PIN THROUGH CARRIER PIN WITH DETENT BOLT CARRIER RIGHT SIDE Figure 5 Pg 18 CARRIER PIN HEAD DISASSEMBLY FOR CLEANING STORAGE Continued FIRING PIN CAM PIN BOLT REMOVAL The Firing Pin Sleeve Firing Pin and Firing Pin Spring can be removed by unscrewing the Rear Roller Bearing Cap Screw and the Firing Pin Sleeve Set Screw underneath it in the Carrier A Figure 7 below Then slide the Firing Pin Sleeve Firing Pin and Firing Pin Spring out of the rear of the Bolt Carrier B below Once the Firing Pin Sleeve Firing Pin and Spring have been removed the Cam Pin C below can be pulled up and out Then the Bolt can be pulled out of the front of the Carrier UNDERSIDE OF BOLT CARRIER SHOWING FIRING Figure PIN SLEEVE AND FIRING PIN IN PLACE gure 6 A REMOVE REAR ROLLER BEARING CAP SCREW amp BEARING THEN REMOVE FIRING PIN SLEEVE SET SCREW C PULL CAM PIN f UP amp OUT 8 e B SLIDE OUT FIRING PIN SLEEVE THEN FIRING PIN amp SPRING Figure 7 EXC F919 Pon DISASSEMBLY FOR CLEANING STORAGE Continued BOLT CARRIER GROUP BEARING CAM PIN Shown here are the disassembled 9 S 3E sot i components of the Bolt Carrier Group screw Ha us 8 La FIRING PIN SLEEVE FIRING PIN amp SPRING ror BUSHMASTER DOES
5. NOT RECOMMEND Figure 8 ANY FURTHER DISASSEMBLY E DOING SO WILL VOID YOUR WARRANTY CLEANING AFTER FIRING YOUR RIFLE clean it as soon as possible to make the job easier and to avoid allowing the development of any corrosion due to powder residue Even when your Rifle has not been fired you should clean it at least once or twice a year if you live in a temperate climate or as often as once a week in a tropical climate IF YOUR RIFLE GETS WET clean it as soon as possible to prevent corrosion or rust USE A HIGH QUALITY RIFLE CLEANING KIT that includes a cleaning rod swab holder cotton flannel bore patches pipe cleaners a small toothbrush brass wire bristle bore and chamber brushes appropriate to the 50 BMG Caliber of this Rifle and a Cleaner Lubricant Preservative CLP Pg 20 CLEANING Continued CLEANING THE BORE The bore of your Bushmaster rifle has Lands and Grooves called Rifling Rifling makes the bullet spin as it moves down the Bore and down range It is difficult to push a new stiff Bore Brush through the Bore You will find it much easier and more effective to pull your Bore Brush through the Bore Also because the brush will clean better if the bristles follow the grooves called tracking you want the Bore Brush to be able to turn as you pull it through ALWAYS CLEAN FROM FROM CHAMBER TOWARD THE MUZZLE Commercial rifle cleaning kits may include alternate cleaning instructions which may be just as effective
6. Safety on SAFE position Insert a loaded Magazine while pushing the Magazine Release Button in about 1 8th of an inch Once the Magazine is inserted about 1 inch into the Magazine Well release the Magazine Release Button PUSH up on the bottom of the Magazine to make sure it is properly inserted into the Magazine Well Pg 14 FIRING THE RIFLE Continued When you are ready to fire push the Bolt Handle forward and then down The Bolt will push a round from the Magazine into the Firing Chamber Make sure the Bolt Handle is down all the way Look at your target through your scope or sights acquire the target move the Safety Selector to the OFF position aim and pull the Trigger The Trigger has a 6 Ib pull Do not tamper with the Trigger system this will void your Warranty After you have fired the round pull the Bolt Handle up and back the Bolt will eject the fired round Then move the Safety Selec tor to the SAFE position before you observe your target with a spotting scope To reload another round simply repeat the same procedure To remove the Magazine push the Magazine Release Button and pull the Magazine out of the Lower Receiver Pg 15 RIFLE DISASSEMBLY PROCEDURES DISASSEMBLY OF THE RIFLE FOR STORAGE OR CLEANING N CAUTION BEFORE BEGINNING ANY RIFLE CLEANING OR DISASSEMBLY PROCEDURES MAKE SURE THE RIFLE IS UNLOADED BY VISUALLY CHECKING THAT THE FIRING CHAMBER IS EMPTY AND THE MAGAZINE HAS BEEN REMOVED FROM THE
7. WITHOUT A MUZZLE BRAKE ASSEMBLY OF MAJOR PARTS OF THE RIFLE The Rifle is shipped in either a Cardboard Case with Foam Inserts or an optional Hard Plastic Shipping Case It is shipped disassembled in the case comprised of four groups UPPER RECEIVER amp BARREL ASSEMBLY LOWER RECEIVER ASSEMBLY BIPOD MAGAZINE Take the Upper Receiver out of the Case by holding onto the Muzzle Brake and the Receiver Housing Place it on a table or flat surface Insert the Bolt Handle with Bolt Handle Sleeve into the Bolt Carrier Group and tighten the Bolt Handle Set Screw with supplied Allen Wrench Pull the Bolt Handle back Inspect the Chamber to make sure it is empty and clear SAFETY MECHANISM There is a single Thumb Lever which prohibits the Rifle from firing by blocking the rear of the Trigger from rotating up effectively preventing the Hammer from being released under spring tension The BA5O also has a Firing Pin Safety that does not allow the Firing Pin to protrude out of the Bolt unless the Bolt is rotated and locked Now take the Lower Receiver out of the Case and manually push the Hammer back until it is cocked Turn the Safety Selector Lever to SAFE horizontal position see Figure 1 next page The pointed end of the Safety Selector Lever should point towards the SAFE marking Pg 11 ASSEMBLY amp DISASSEMBLY PROCEDURES Continued ASSEMBLING THE RIFLE UPPER RECEIVER TO LOWER Push the Front Pivot Pin and the Rear Take Down Pin
8. out of the Lower Receiver from the left side Assemble the Upper Receiver with the Lower by aligning the Pivot Pin hole first Push the Pivot Pin into the Upper Receiver from right to left Figure 1 UPPER RECEIVER BARREL ASSEMBLY LOWER RECEIVER HAMMER COCKED BY With the ASSEMBLY PUSHING TO THE REAR Hammer cocked TAKE and the Safety DOWN Selector on SAFE pivot the Upper Receiver down onto the Lower Receiver When Receivers are completely closed the Rear Take Down Pin can be pushed in from right to left to complete this assembly Note Front Pivot Pin and the Rear Take Down Pin are captivated by their detents so they can t fall out and be lost SAFETY SELECTOR Pg 12 IN SAFE POSITION ASSEMBLY amp DISASSEMBLY PROCEDURES Continued ASSEMBLING THE RIFLE BIPOD ASSEMBLY Remove the Bipod Attachment Nut by unscrewing it from its stud on the Handguard may require a 3 4 wrench to initially loosen it Attach the Bipod onto the Upper Receiver by sliding it onto the Bipod Stud then screw the Bipod Nut back on Tighten by hand then with 3 4 wrench A CAUTION RIFLE IS NOW READY FOR USE DO NOT INSERT A LOADED MAGAZINE UNTIL YOU ARE AT A SHOOTING RANGE AND READY TO FIRE THE RIFLE ALWAYS REMEMBER TO USE EYE AND EAR PROTECTION AMMUNITION A CAUTION USE ONLY HIGH QUALITY CLEAN DRY AMMUNITION FROM A REPUTABLE MANUFACTURER FAILURE TO DO SO MAY PLACE YOU OR THOSE AROUND YOU
9. AT RISK AND MAY DAMAGE YOUR RIFLE AND OR VOID YOUR WARRANTY If you buy ammunition that is over pressured or is possibly old or surplus firing such ammunition will cause the brass to swell and stick in the Firing Chamber and cause problems when pulling back on the Bolt Handle for Case extraction Only new high quality ammunition from reliable manufacturers should be fired in this rifle Pg 13 FIRING THE RIFLE BREAK IN PERIOD NOTE YOUR MODEL BA50 RIFLE WILL REQUIRE SHOOTING ABOUT 75 ROUNDS TO BREAK IN PROPERLY The Bolt Action of the Rifle will get smoother after the break in period Every time you pull the Bolt Handle back to charge a new round pull the Handle back all the way and push it forward and down all the way If the Bolt is not properly closed you should not fire the Rifle To visually check if the Bolt is closed properly look at the Ejection Port Opening The Bolt Carrier should be flush with the Barrel Extension If it is not the Bolt it is not completely closed The Bolt Handle should be all the way down in the Handle Slot in the Upper Receiver Eject the round and inspect the Chamber for any obstruction The Firing Chamber may need cleaning if the Rifle has fired more than 50 Rounds When you are ready to fire the Rifle make sure you have a safe place to shoot with a good back stop sufficient to stop a 50BMG round Keep the Rifle pointed down range Unlock the Bolt and pull it back all the way Place the Rifle s
10. E FIREARMS HANDLING INTRODUCTION GENERAL INFORMATION This Manual includes specific operating and maintenance instructions and safety information pertaining to all Bushmaster BA50 50 BMG Browning Machine Gun Caliber Bolt Action Rifles and Carbines PREPARATION FOR STORAGE OR SHIPMENT Except in extreme situations Bushmaster BA50 models should always be stored and transported in their original factory cases SPECIFICATIONS CALIBER 50 BMG Browning Machine Gun Cartridge 12 7 X 99 mm WEIGHT Rifle 30 Lbs 13 61 kg Carbine 27 Lbs 12 25 kg OVERALL LENGTH Assembled Rifle 58 147 32 cm Carbine 50 127 00 cm BARREL LENGTH Rifle 30 76 2 cm Carbine 22 55 88 cm RIFLING 1 x 15 38 1 cm MAGAZINE CAPACITY 10 Rounds BUTTSTOCK Standard AR15 Type with Trapdoor Storage Compartment SAFETY Standard AR15 Type Safety with Manual Thumb Lever Left Side OPTIC MOUNTING RAIL MIL STD 1913 Rail MUZZLE VELOCITY Approximately 2850 fps 853 mps w std 660 grain 42 89 projectile MAXIMUM RANGE Approximately 6 800 meters Pg 5 MAINTENANCE INSPECTION OF RIFLE S MAJOR GROUPS The Rifle s Four Major Groups are e LOWER RECEIVER e BOLT CARRIER GROUP e UPPER RECEIVER BARREL ASSEMBLY e BIPOD ASSEMBLY Ensure all components are present and inspect for obvious damage Report any discrepancies or problems to Bushmaster Customer Service 1 800 883 6229 Detailed inspec
11. HE BARREL should be clean and free of any obstructions 2 THE HAND GUARD should be tightly attached to the Barrel Locking Collar Do not remove the Hand Guard 3 THE BIPOD ASSEMBLY MOUNT should be attached to the Hand Guard tightly Do not remove this Mount 4 THE UPPER RECEIVER body should not be cracked chipped pitted or worn 5 MUZZLE BRAKE should be tightly screwed to the barrel Do not remove the muzzle brake 6 ALL SCOPE MOUNTINGS should be tight in good condition and free of oil INSPECTION OF THE BIPOD 7 If any parts of the BIPOD are cracked do not use it Replace it immediately 2 THE BIPOD LEGS should not be bent 3 All parts of the BIPOD should be clean and dirt free to function properly Pg 8 MAINTENANCE Continued A CAUTION BEFORE BEGINNING ANY RIFLE CLEANING PROCEDURES MAKE SURE THE RIFLE IS UNLOADED BY VISUALLY CHECKING THAT THE FIRING CHAMBER IS EMPTY AND THE MAGAZINE HAS BEEN REMOVED FROM THE LOWER RECEIVER GENERAL MAINTENANCE 1 Ensure that all bearing surfaces and exposed parts particularly those listed below are clean and properly lubricated BOLT AND CARRIER TRIGGER ASSEMBLY BIPOD ASSEMBLY 2 Inspect all parts and tighten or replace as necessary Each time the rifle is assembled for firing make sure the barrel and chamber are free of excess oil If possible perform an operational check with dummy rounds up to 10 maximum magazine capacity to confirm proper function T
12. LOWER RECEIVER Disassembly will be the reverse of some of the procedures already described for Assembly Push out the Rear Take Down Pin from the left side pivot the Upper Receiver to an open position and push the Front Pivot Pin out to separate the Upper and Lower Receivers Place the Upper Receiver on a flat solid surface REMOVING THE BOLT CARRIER GROUP Refer to Figures 2 amp 3 on the next page Pull the Bolt Handle up and slide it back to expose the Firing Chamber Check again to make sure the Chamber is empty and the Rifle is unloaded Now close the Bolt and rotate the Bolt Handle down You will see a Set Screw on the Bolt where the Handle is attached to the Bolt Using a 3 32 Allen Wrench unscrew the Set Screw until it is rotated out of the Bolt about 1 8th inch Once the Set Screw is loose unlock the Bolt by lifting Handle up then slide the Handle out of the Bolt along with the Handle Sleeve Then slide the Bolt Carrier Group out of the rear of the Upper Receiver Pg 16 DISASSEMBLY FOR CLEANING STORAGE Continued 3 32 ALLEN WRENCH REMOVE HANDLE AND SLEEVE SET SCREW Figure 2 Figure 3 Pg 17 DISASSEMBLY FOR CLEANING STORAGE Continued BOLT CARRIER DISASSEMBLY REMOVING CLEVIS PIN After sliding the Bolt Carrier out of the Upper Receiver remove the Carrier Pin which holds the Firing Pin within the Carrier by pushing in it s detent on the left side of the Carrier see
13. RIFLE 30 Lbs 13 61 kg ET eU CARBINE 27 Lbs 12 25 kg y tg race ee N N MUZZLE BRAKE MUZZLE BRAKE MUZZLE BRAKE COMPLETE Pg 26 2008 Bushmaster Firearms International LLC Windham Maine SCHEMATIC DIAGRAM BUSHMASTER BA5O Continued LOWER RECEIVER BUTTSTOCK MAGAZINE amp COMPONENTS RECEIVER EXTENSION lt 8MBSBI REM COMPLETE LOWER RECEIVER HAMMER BMG 17927 BMG 17921A HAMMER SPRING BMG 17967 SAFETY SELECTOR LEVER 9381367 S ANTI WALK HAMMER RS Ow Gn PN MH CIRCLIPS 2 gs TUE wncaze CATCH 9 8448638 d STRIPPED LOWER RECEIVER N MAGPUL PRS BUTTSTOCK MAG300 BLK SPRING 8448586 TAKEDOWN PIN DETENT 8448585 SAFETY DETENT 8448631 NE i fo i SAFETY DETENT D MAGAZINE RELEASE N PIVOT PIN MAGAZINE mS SPRING 9448516 SPRING 8448637 PIVOT PIN 2448585 ANS DO COMPLETE 10 ROUND MAGAZINE RELEASE BMG 17965 EN V is MAGAZINE BUTTON BMG 17928 E BMG 17972A ERGOGRIP NA i TACTICAL i PISTOL GRIP S ud TRIGGER 8448592 5R INCLUDES CS SPRING 8448593 SCREW amp WASHERS S N MAGAZINE BOX Gy Du BMG 17972 ON FLAT WASHER e LOCK WASHER K JN MAGAZINE PISTOL GRIP SCREW FOLLOWER BMG 17971 ss MAGAZINE FLOOR PLATE BMG 17972BP anat 2008 Bushmaster Firearms International LLC Windham Maine WARRANTY BUSHMASTER LIMITED ONE YEAR WARRANTY Bushmaster Firearms are warranted to be free from defects in materials and wo
14. UAR H AN501D416 18 FORTIS HANDGUARD HANDGUARD FIRING PIN i LOCKING COLLAR FOR 14 HANDGUARD DOWELPIN COMPLETE 7 BRE ta ROLLER SLEEVE oe BMG 17932 E S COMPLETE FIRING PIN BMG 17966 ASSEMBLY pychRING CARRIER BIN o Q d TOP RAIL BMG 17936A MG 17998 FS BOLT BMG 17924 f 1 SCREWS 4 BOLT CARRIER eA 17933 XTRACTOR SPRING BMG 17933 te EXTRACTOR SCREW Oey EJECTOR SET SCREW a BMG 17954 BMG 17926 hea i R N EXTRACTOR JECTOI n BMG 17964 BMG 17925 B ANSOID416 18 BMG 17953 M PRIMARY EXTRACTION GUARD BMG 17940 BIPOD MOUNT 2 L7 PRIMARY EXTRACTION GUARD SCREWS 2 BMG 17962 BMG 17922 E i D BARREL EXTENSION INDEXING ai Ae vans 2 N lt gt Uo Mesi 14 HANDGUARD FOR S _ of 30 BARREL BMG 17919 Cte fl BARREL EXTENSION COLLAR id BMG 17945 a i 7 BIPOD MOUNT N r ANSOTDAYG se MOUNT NUT e CALIBER 50BMG 12 7 X 99 MM BARREL EXTENSION Pd M A BMG 18001 MODE OF FIRE BOLT ACTION REPEATER MUFAE SRARE Bue a 10 ROUND MAGAZINE SCREWS 18 9 UPI DOWN Reese e LENGTH OVERALL PERATA 30 BARREL BMG 17944 MUZZLE BRAKE RIFLE 58 147 32 cm CARBINE 50 127 00 cm BARREL LENGTH RIFLE 30 76 2 cm CARBINE 22 55 88 cm MUZZLE BRAKE THREADED INSERT N MUZZLE BRAKE MUZZLE BRAKE m LN BMG 17915 pMGizerg FRONTSPOOL TIS INSERT lt lt Mid Ne BMG 17917 BMI RIFLING 1 x 15 38 1 cm Pd i 7 e WEIGHT MUZZLE BRAKE aC
15. ZINE BODY FOLLOWER SPRING BASE PLATE Figure 9 Pg 23 ASSEMBLY AFTER CLEANING ASSEMBLY OF THE BOLT CARRIER GROUP Insert the Bolt into the Bolt Carrier the large lug on the Bolt with the hole for the Bolt Handle should be facing up You ll be able to see the Cam Pin hole through the large slot at the top of the Bolt Carrier Insert the Cam Pin with its hole for the Firing Pin aligned so that you can slide the Firing Pin and Firing Pin Spring through the Cam Pin holding it in place The Firing Pin should be inserted with its protruding side pins in a horizontal position When you can see through the Carrier Pin holes in the Bolt Carrier and the Firing Pin you have proper alignment to insert the Carrier Pin Then insert the Carrier Pin from the right side of the Bolt Carrier You may need to slightly rotate the Firing Pin to allow alignment and insertion of the Carrier Pin Once fully inserted the Carrier Pin will protrude on the left side of the Bolt Carrier and will be held in place by its spring and detent mechanism Perform a FUNCTION CHECK on the Firing Pin Safety by keeping pressure on the back of the Firing Pin and rotating the Bolt within the Carrier With the Bolt completely rotated clockwise as you look at the Bolt Face you should see the Firing Pin protruding from its hole in the center of the Bolt Face Maintain the pressure on the back of the Firing Pin and rotate the Bolt back all the way up counterclockwise into lock
16. as it may damage your rifle A SAFETY NOTE REGARDING LEAD Discharging firearms in poorly ventilated areas cleaning firearms or handling ammunition may result in exposure to lead a substance known to cause birth defects reproductive harm and other serious physical injury Have adequate ventilation at all times Wash hands thoroughly after exposure This Operating and Safety Instruction Manual should always accompany your Bushmaster Firearm Model Serial Number Issued To Date Issued PO Box 1479 999 Roosevelt Trail TABLE OF CONTENTS Windham Maine 04062 U S A Tel 1 800 883 6229 lide SAFE HANDLING WARNINGS CAUTIONS 1 info bushmaster com INTRODUCTION 5 SPECIFICATIONS 5 MAINTENANCE 6 ASSEMBLY DISASSEMBLY PROCEDURES 11 AMMUNITION 13 Thank you for purchasing this fine Bushmaster FIRING THE RIFLE 14 Rifle Everyone at Bushmaster Firearms hopes DISASSEMBLY FOR CLEANING 16 you have a safe and enjoyable shooting experi CLEANING PROCEDURES 20 ence with your Bushmaster BA5O Rifle ASSEMBLY AFTER CLEANING 24 SCHEMATIC DIAGRAM 26 WARRANTY 28 FUNDAMENTAL RULES iSAIFEIGUN HANDLEING ALWAYS KEEP THE GUN POINTED IN A SAFE DIRECTION NEVER LOAD THE GUN UNTIL READY TO USE KEEP YOUR FINGER OFF THE TRIGGER UNTIL READY TO SHOOT Pg 1 WARNING ALWAYS USE EYE AND HEARING PROTECTION WHEN SHOOTING THIS RIFLE Eye and Ear protectio
17. ed position Cam Pin aligned with Bearings on top of Bolt Carrier The Firing Pin should go back into the Bolt If this function check did not work properly then the assembly is incorrect Disassemble it and reassemble it following the above instructions Pg 24 ASSEMBLY AFTER CLEANING Continued Now insert the Bolt Carrier back into the Upper Receiver by keeping all three Bearings in a straight line and the Bolt end forward to mate with the Barrel Push the Bolt Carrier fully into the Upper Receiver then slide the Bolt Handle and its Sleeve into the Bolt and rotate the Handle downward until it stops locking the Carrier into position within the Receiver With the bend of the Bolt Handle angled down from the Upper you can then tighten the Bolt Handle Set Screw with the 3 32 Allen Wrench The Handle should now be tightly locked in position exhibiting little or no play or rotation Now the Upper Receiver is ready to be stored in the case or assembled onto the Lower Receiver in preparation for shooting Pg 25 SCHEMATIC DIAGRAM BUSHMASTER BA5O UPPER RECEIVER BARREL E BMG ded rn CAP scii g EMG 17958 CAP SCREW BOLT HANDLE BOLT HANDLE END KNOB MUZZLE BRAKE i F REND Cup PNE ke BOLT amp COMPONENTS E BEARING i i i X T X Pl BMG 17949 FIRING PIN SLEEVE SET SCREW MAIN LOCKING TOP RAIL FIRING PIN BMG 18008 ES emo a y BOLT HANDLE COLLAR BMG 17939 l SCREWS 4 TOP RAIL OPTIONAL BMG 17936 e BMG 17946 DG
18. his insures that ammunition will chamber and extract properly 3 Before Firing the Rifle Thoroughly clean and dry the Bore and Chamber Use cleaning rods by inserting them from the Chamber to the end of the barrel Be careful not to damage the Muzzle Crown since this effects the accuracy of the Rifle 4 After Firing the Rifle The Rifle should be cleaned and lubricated as soon as possible after each shooting session After every 50 rounds it is recommended that the Chamber and Bore be scrubbed with a copper solvent to remove deposits Pg 9 MAINTENANCE Continued 5 Long Term Maintenance t the Rifle is not being fired for 30 days or more oil the Rifle especially the Bore and Chamber depending on climate conditions in your area For storage periods of six months or more apply a good quality coating oil to the Rifle and inspect it for re oiling every six months 6 Troubleshooting f you experience any difficulty pulling back on the Bolt Handle you may have a dirty Chamber that needs cleaning or the ammunition you are using has too much chamber pressure and should not be used If you have difficulty closing the Bolt during firing you may have an obstruction in the Chamber requiring cleaning or your ammunition might be out of specification and should not be used Pg 10 ASSEMBLY amp DISASSEMBLY PROCEDURES A WARNING THE MUZZLE BRAKE ON THIS RIFLE SHOULD NEVER BE REMOVED SERIOUS INJURY CAN OCCUR IF RIFLE IS FIRED
19. n is provided with this rifle WARNING If this firearm is carelessly or improperly handled unintentional discharge could result and could cause injury death or damage to property Read and understand all of this Manual before removing this firearm from its package This Bushmaster Rifle is classified as a firearm by the Alcohol Tobacco and Firearms division of the Department of Justice This Rifle may discharge accidentally when a round is fed into the chamber if it is dropped or receives a blow to the muzzle or front of the Rifle This can occur regardless of the position of the hammer or any of the various safety devices Please use extra Care and strict adherence to these instructions to avoid the risk of accidents A CAUTION GENERAL HANDLING ALWAYS handle your firearm as if it were loaded NEVER point your firearm at anything you do not intend to shoot NEVER take anyone s word that the rifle is unloaded check the chamber for yourself to make sure the rifle is unloaded to avoid accidental discharge ALWAYS make sure your rifle is not loaded and the chamber is empty before laying it down or handing it to another person ALWAYS keep and carry your rifle unloaded with the hammer forward except when you intend to shoot ALWAYS be aware of possible risk from dropping your rifle You may not be able to see if any part of the rifle is damaged If damage is severe the firearm may discharge and cause injury death or damage to property Pg 2
20. omes through clean CLEANING OTHER COMPONENTS OF THE RIFLE BOLT CARRIER GROUP The parts of the Bolt Carrier Group should be wiped down with CLP type Cleaner or other suitable solvent and lightly oiled with a quality gun oil before reassembly UPPER RECEIVER BARREL ASSEMBLY amp LOWER RECEIVER The interior and exterior of the Upper Receiver Barrel Assembly and the Lower Receiver should be thoroughly cleaned with CLP type Cleaner or other suitable solvent Lightly oil all surfaces before reassembly Pay particular attention to lubrication of the Hammer Trigger and Safety Selector and test for smooth function before reassembly BIPOD ASSEMBLY Clean with CLP solvent and a small brush toothbrush to remove any exterior dirt or mud Lubricate all moving parts with quality gun oil Pg 22 CLEANING Continued MAGAZINE The Magazine can be disassembled by sliding the Base Plate off the Magazine Body after prying up the front end of the plate use an Allen Wrench or Screwdriver for leverage The Magazine Spring can then be worked side to side out of the Magazine Box Then the Cartridge Follower can be dropped out of the Magazine Box Clean all parts and lightly lubricate before reassembling in reverse order from description above Note that the Follower will only fit into the Magazine Box one way and the Spring must be oriented so as to fit over the heavy protrusion on the underside of the Follower P TUANA MAGA
21. plied warranty negligence or otherwise Some states do not allow the exclusion of limitation of incidental or consequential damages so the above limitation may not apply to you Bushmaster Firearms International LLC will not be responsible for the results of careless handling unauthorized adjustments defective low quality reloaded or improper ammunition corrosion neglect ordinary wear and tear or unreasonable use Furthermore the liability of Bushmaster Firearms International LLC under this warranty shall be limited solely to the obligation to repair or replace the firearm and to pay transportation and insurance charges for return of the firearm to owner NOTE Handguns and long guns are classified as FIREARMS or DANGEROUS WEAPONS Guns are surrendered by Bushmaster Firearms International LLC with the express understanding that it assumes no responsibility for resale handling under local laws and regulations Pg 28
22. rkmanship Any such defect of which Bushmaster Firearms International LLC is given written notice as provided below within one year and ten days from the date of first purchase by a customer will be remedied by Bushmaster Firearms International LLC This warranty is granted by Bushmaster Firearms International LLC P O Box 1479 999 Roosevelt Trail Windham Maine 04062 To initiate a Warranty claim call Bushmaster Customer Service toll free 8 30 AM to 6 00 PM E S T Monday thru Friday 1 800 883 6229 to get an RMA number Return Merchandise Authorization Warranty claims should state in writing the model and serial number of the firearm concerned a description of the difficulty experienced and the date of purchase The firearm concerned should be shipped transportation charges prepaid to the Warranty Service Department Bushmaster Firearms International LLC 999 Roosevelt Trail Windham ME 04062 Firearm shipment should be insured by the owner as Bushmaster Firearms International LLC will accept no responsibility for loss or damage in transit Shipping and insurance charges for the return of a firearm to its owner will be paid by Bushmaster Firearms International LLC if the related claim is a proper claim for warranty work Under no circumstances shall Bushmaster Firearms International LLC be responsible for incidental or consequential damages with respect to economic loss or injury to property whether as a result of express or im
23. tion must be loaded to SAAMI standards by a reputable insured manufacturer Bushmaster does not recommend the use of remanufactured or hand loaded ammunition as it may damage your rifle CAUTION NEVER USE SLAP ROUNDS IN THIS RIFLE THEY WILL NOT FIT IN THE CHAMBER AND MAY CAUSE DAMAGE DOING SO WILL VOID YOUR WARRANTY This manual should always accompany this firearm f you lend give or sell this firearm make sure this manual goes with it If there is anything you do not understand get help from the factory or a qualified person in the safe handling of firearms If unfamiliar with firearms seek further advice through safe handling courses run by your local gun club NRA approved instructor or similar qualified organizations Inside Back Cover N N PLEASE PRACTICE SAFE FIREARMS HANDLING WARNING IF THIS FIREARM IS CARELESSLY OR IMPROPERLY HANDLED UNINTENTIONAL DISCHARGE COULD RESULT AND COULD CAUSE INJURY DEATH OR DAMAGE TO PROPERTY CAUTION CAREFULLY READ THIS INSTRUCTION MANUAL PRIOR TO LOADING AND FIRING THIS FIREARM FOLLOW ALL INSTRUCTIONS ON THE PROPER HANDLING AND SAFE USE OF THIS FIREARM LIVES MAY DEPEND ON IT WARNING USE ONLY CLEAN DRY HIGH QUALITY COMMERCIALLY MANUFACTURED AMMUNITION APPROPRIATE TO THE 50 BMG CALIBER OF THIS FIREARM Ammunition must be loaded to SAAMI standards by a reputable insured manufacturer Bushmaster does not recommend the use of remanufactured or hand loaded ammunition
24. tion should be conducted as described on the following pages BOLT CARRIER GROUP S UPPER RECEIVER BARREL ASSEMBLY A BIPOD ASSEMBLY LOWER RECEIVER BUTTSTOCK Pg 6 MAINTENANCE Continued INSPECTION OF THE LOWER RECEIVER 1 LOWER RECEIVER should not have any pits or cracks the Butt Stock and Pistol Grip should not move and must be firmly attached to the Receiver All the Trigger Group Parts should be functioning properly Both the Take Down Pins should be in the Receiver INSPECTION OF THE BOLT CARRIER GROUP 1 THE BOLT should move freely in and out of the Bolt Carrier by rotating with the Cam Pin 2 THE EJECTOR AND EXTRACTOR must be checked to ensure they are under spring tension and show no signs of chipping cracking or wear 3 THE CARRIER PIN which holds the Firing Pin in place should not be bent or cracked and the Spring Detent mechanism at its tip should be functional in order to hold the pin within the Bolt Carrier 4 INSPECT FIRING PIN PROTRUSION by pushing the Bolt into the Carrier and manually pushing the Firing Pin forward Check the Firing Pin hole on the Bolt Face Make sure it is not eroded or elongated Bolt face should not be pitted 5 THE CARRIER BEARINGS should be tightly screwed into the Carrier on the top side This part should never be taken out of the Bolt Carrier by unscrewing the screws Pg 7 MAINTENANCE Continued INSPECTION OF THE UPPER RECEIVER 1 T
25. to shoot ALWAYS make sure your rifle is clean with the barrel and chamber free of any obstruction before using this rifle NEVER shoot this rifle at a hard surface such as a rock or liquid surface such as water as the bullet may ricochet and travel in any direction and strike you or another object you cannot see causing serious injury death or property damage Pg 3 WARNINGS CAUTIONS CONTINUED NEVER engage in horseplay while holding or using this Rifle NEVER walk or climb with this Rifle loaded and cocked ready to fire NEVER dryfire this Rifle when the Receivers are open DO NOT abuse your Rifle by using it for any purpose other than shooting NEVER alter any parts of this Rifle as it may reduce the level of safety and or void your Warranty CLEANING AND STORAGE Always make sure your Rifle is unloaded before cleaning and storing Keep Ammunition and Rifle in separate locked places away from children and untrained people in your household A WARNING THE MUZZLE BRAKE ON THIS RIFLE SHOULD NEVER BE REMOVED SERIOUS INJURY CAN OCCUR IF THIS RIFLE IS FIRED WITHOUT THE MUZZLE BRAKE A WARNING ALWAYS MAKE SURE THE BACK DROP OF YOUR RANGE IS BIG ENOUGH TO STOP A 50 CALIBER ROUND IF THE RANGE DOES NOT ALLOW 50 CALIBERS DO NOT SHOOT THIS RIFLE AT THAT RANGE THERE COULD BE BACK DROP ISSUES THAT PREVENT SAFE SHOOTING OF 50 CALIBER RIFLES FIND A RANGE THAT HAS A LARGE ENOUGH DIRT HILL FOR A 50 CALIBER ROUND P 4 ALWAYS PRACTICE SAF
Download Pdf Manuals
Related Search