Bushmaster Xm15 Instruction Manual

							39
OPERATION OF YOUR RIFLE…
INSERTING A MAGAZINE…
3.) Push Magazine up into Magazine Well
     until Magazine Catch engages and holds
     the Magazine.
4.) Tap upward on Magazine bottom to
     make sure its seated correctly.
40
OPERATION OF YOUR RIFLE …
CHAMBERING A ROUND with Bolt Assembly Open …
NOTE:  
2.) TAP the Forward Assist to ensure
     Bolt is fully forward and locked. 
1.) Depress upper portion of Bolt Catch.
     Bolt should spring forward.
BOLT CATCH
FORWARD ASSIST 
						

							41
OPERATION OF YOUR RIFLE…
CHAMBERING A ROUND with Bolt Assembly Closed …
3.)TAP the Forward Assist to ensure
     Bolt is fully forward and locked. 
FORWARD
ASSIST
NEVER “ Ride ” (or push) the Charging
Handle. Let it move forward on its own.
2.) Release the Charging Handle.1.) Pull Charging Handle fully to rear.
NOTE: 
            is still on SAFE, and close the Ejection Port Cover to keep \
out dirt.
42
IMMEDIATE ACTION in case of trouble …
WARNING: DO NOT LOAD WITH A HOT CHAMBER. A ROUND MAY  “COOK OFF ”
                    (meaning it may fire from the heat of the chamber)\
IF YOUR RIFLE STOPS FIRING: 
2.) PULL Charging Handle all the way back
     Observe ejection of case or cartridge.
     Check Chamber for any obstruction.
1.) SLAP upward on Magazine to make
     sure its seated properly.
FIRING CHAMBER 
						

							43
IMMEDIATE ACTION in case of trouble (continued)…
3.) If cartridge or case is ejected or chamber
     is clear, RELEASE Charging Handle to
     feed a new round. Dont “ride ” the 
     Charging Handle forward.
4.) TAP Forward Assist.5.) Now FIRE. If the Rifle wont fire, look
     for trouble and apply remedial action.
     (See next page.)
44
REMEDIAL ACTION …
IF YOUR RIFLE STILL FAILS TO FIRE, CHECK THE TROUBLESHOOTING SECTION
IN THIS MANUAL - OR TAKE THE RIFLE TO A QUALIFIED GUNSMITH.
If your Rifle still fails to fire after performing
Steps 1 through 5 on previous page, check
again for a jammed cartridge case.
WARNIN G :  If   y o ur  rif le  s to ps flr in g w it h  a  liv e ro und in  th e c h am ber  o f  a  h ot  b arre l, 
r e m ove  th e r o und fa st.  H ow ever,  if   y o u c an not  r e m ove it   w it h in  1 0 s ec o nds,  r e m ove th e 
m ag azin e a n d w ait  1 5 m in ute s w it h  t h e r if le  p oin tin g in  a  s afe  d ir e ctio n ( a lw ays c h eck t h at 
t h e “ S A FE ” d ir e ctio n re m ain s s afe  d urin g th at  tim e).  T his  w ay y o u w ont   g et  h urt  b y a  
p o ss ib le   ro und  co okin g o ff .  R EG ARDLE S S,  K EEP Y O UR F A CE A W AY F R O M  T H E 
E JE C TIO N P O RT W HIL E  C LE A RIN G  A  H O T C HAM BER .
If  a  c a rtr id ge c a se  is  in  th e c h am ber,  o pen 
t h e r e ce iv e rs ,  r e m ove  th e b olt   c a rrie r,  a nd tr y  
t o  t a p o ut th e c a se  w it h  a  c le anin g r o d. 
						

							46
PROBLEMCHECK FOR:WHAT TO DO
45
1. Remove the Magazine
WARNING: If  an  audible  “POP”  or  reduced  RECOIL  is  experienced  during  firing,  
						

							47
TROUBLESHOOTING (continued)…
PROBLEM
BOLT WONT  
UNLOCK
WONT  EXTRACT
CHECK FOR:
Dirty or burred Bolt.
Broken Extractor Spring.
Dirty or corroded Ammo.
Carbon in Chamber.
Fouling or carbon in  
Extractor recess or lip.
WHAT TO DO
Clean or see a qualified gunsmith.
See a qualified gunsmith.
Remove stuck round - push out 
with cleaning rod.
Clean Chamber.
Clean Extractor.
TROUBLESHOOTING (continued)…
PROBLEM
WONT FEED
CHECK FOR:
Dirty or corroded Ammo.
Dirty Magazine.
Defective Magazine.
Too many rounds in  
Magazine.
Action of Buffer  
Assembly is restricted.
Magazine not fully  
seated.
WHAT TO DO
Clean.
Clean.
Replace.
Take out excess.
Take out Buffer and Spring - Clean them.
Adjust Magazine Catch:
48
PRESS MAGAZINE 
CATCH BUTTON
ON RIGHT SIDE 
						

							CLEAN
TROUBLESHOOTING (continued)…
PROBLEM
WONT LOCK
WONT EXTRACT
CHECK FOR:
Dirt, corrosion, or carbon  
buildup in barrel locking  
lugs
Frozen Extractor.
Restricted Buffer  
Assembly.
Restricted movement of  
Bolt Carrier Group.
WHAT TO DO
Clean lugs.
Remove and 
clean.
Remove and 
clean.
Remove, clean, and lube.
(Before putting Bolt back in, make sure Gas  
Tube fits into Carrier Key and that the Carrier  
moves freely.)
50
49
TROUBLESHOOTING (continued)…
PROBLEM
WONT FEED
(continued)
DOUBLE FEED
WONT CHAMBER
CHECK FOR
Defective Magazine.
Dirty or corroded Ammo.
Damaged Ammo.
Carbon in Chamber or  
on Gas Tube
What To Do
Turn Catch Clockwise to tighten and  
Counterclockwise to loosen
Replace.
Clean.
Replace.
Clean.
TURN CATCH
ON LEFT SIDE 
						

							Check with Q-Tip/Pipe Cleaner
TROUBLESHOOTING (continued)…
PROBLEM
SHORT RECOIL  
(continued)
BOLT FAILS TO  
LOCK AFTER  
LAST ROUND
SELECTOR  
LEVER BINDS
CHECK FOR:
Q-Tip or Pipe Cleaner  
pieces stuck inside  
Carrier Key.
Dirty or corroded Bolt  
Latch.
Faulty Magazine
Needs oil.
Dirt or sand under  
Trigger.
WHAT TO DO
Clean out if possible or have Rifle checked by  
a qualified gunsmith.
Clean - or replace Bolt Catch.
Check for Buffer Endcap backout or  
obstruction.
Check for full travel of Bolt Carrier
Replace.
Lubricate with CLP.
Clean.
52
51
TROUBLESHOOTING (continued)…
PROBLEM
SHORT RECOIL
CHECK FOR
Correct alignment of  
Gaps in Bolt Gas Rings
Carbon or dirt in Carrier  
Key or on outside of Gas  
Tube.
What To Do
“Gaps ” in the 3 Gas Rings should be 
staggered 120  around the Bolt body for  
maximum effectivness.
Clean 
GAP
GAP
GAP 
						

							53
TROUBLESHOOTING (continued)…
PROBLEM
BOLT CARRIER  
“HUNG UP ”
CHECK FOR:
Round jammed between  
Bolt and Charging  
Handle and/or double  
feed
WHAT TO DO
1.) Remove Magazine.
2.) Push in on the bottom of the Bolt Latch.
3.) While pulling down on Charging Handle, 
4.) While Bolt is held to the rear, round should 
WARNING:
KEEP CLEAR 
OF MUZZLE.
CAUTION:
AFTER ROUND
IS REMOVED,
BOLT IS UNDER
TENSION.
NOTE: If this procedure fails, use a section of cleaning rod to 
             push the Bolt fully to rear through the Ejection Port.
54
DISASSEMBLY VIEWS - Bushmaster XM15 E2S Rifle
Upper Receiver  / Barrel / Bolt Carrier / Sight Groups
(See also next page)
HandguardSnap RingMS16626-1137
Weld Spring  8448555Delta Ring  8448712Indexing Pin  9349054BIPBarrel Extension 9349054BEBarrel Nut  9349054BNMetal Handguard Liner (2)(Included with handguard)Thermoset Handguard (2)9349059      
Front Sight Post  9349056
Front Sight Detent Spring  8448574Front Sight Detent  8448573
Handguard Cap  9349053Gas Tube Roll Pin  MS16562-106Front Sight  9349054FSHA
Front SightTaper Pins (2)   9349054BTP
BARREL - FULL LENGTH HEAVYSTYLE - CHROME MOLYBDENUM STEELWITH HARD CHROME LINED BORE AND CHAMBER. STANDARD MODELRIFLE AVAILABLE WITH 20, 24 OR 26 BBL.
Front Sling Swivel   8448571Front Sling Swivel Rivet   8448697
Charging HandleLatch Roll Pin     8448521-2
Charging HandleLatch Spring8448520
Charging HandleLatch  8448519
Charging Handle8448518
Rear Sight Helical   Spring   9349069
REAR SIGHTASSEMBLY / COMPONENTSRear Sight Windage  Screw  9349076Rear Sight Base  9349074
Rear Sight Ball Bearing     MS19060-4808Rear Sight Aperature      9349075Rear Sight Flat Spring  8448536Rear Sight Ball Bearing     MS19060-4808
Rear SightWindageKnob PinMS1656-103
Rear SightWindageKnob9349077
Rear Sight Index  Spring  9349069
Bolt Carrier Key Screw (2)  8448508Bolt Carrier Key  8448506
Firing Pin Retaining Pin  8448504Cam Pin  8448502
Firing Pin  8448503
Bolt Carrier  8448507Bolt Gas Rings (3)  8448511K
Bolt  8448510Extractor Spring  8448755SPExtractor Spring Insert 8448754Extractor  8448512
Extractor Pin  8448513Ejector Roll Pin MS16562-98Ejector Spring  8448516Ejector  8448515
Ball Bearing MS19060-4808
Index Screw   9349065Rear Sight Assembly9349072Rear Sight ElevationIndex   9349066Elevation Knob9349067
Elevation Index  Spring  9349069Upper Receiver       9349063      Forged of 7075T6               Aircraft Quality                      Aluminum
Rear Sight ElevationSpring 9349070
Pawl Detent  8448544
Forward Assist Pawl   8448543
Pawl Spring  8448542
Pawl Spring PinMS16562-103
Forward AssistPlunger  9349085
Forward AssistSpring PinMS16562-103
Rear Sight        Elevation      Spring Pin   MS16562-121
UPPER RECEIVER, BOLTAND BOLT CARRIERASSEMBLIES / COMPONENTS
8
Bolt Assembly  8448509
Bolt & Bolt Carrier Assembly8448501-S
Forward AssistSpring   8448540Forward Assist Assembly9349086
Gas Tube  8448567BARREL ASSEMBLY AND COMPONENTS 
						

							If  yo ur  B ush m aste r  O pera tio n  M anual  is   lo st  or  destr o ye d,  yo u  ca n  obta in   a 
r e pla ce m ent  b y w rit in g to  B ush m aste r F ir e arm s,  In c.  9 99 R oosevelt  T ra il,  W in dham , 
M ain e 0 4062 U SA  o r b y c allin g 1 -8 00-8 83 -6 229 .  W hen re questin g a  m anual,   in clu de 
t h e  s e ria l  n um ber o f y o ur r if le .
T his  O pera tio n M anual  s h ould  a lw ays a cco m pany th is  fir e arm .  W hen y o u le nd ,  g iv e  o r 
s e ll  th is  fir e arm , b e s u re  th is  M anual  g oes w it h  it .
M odel:
S eria l  N um ber:
P urc h ase d fr o m :
Date  P urc h ase d:
PLEASE PRACTICE SAFE FIREARMS HANDLING
55
56
FIRESAFE
Hammer with J pin    8448612-SK
MagazineFollower
Magazine - Sold as a Complete Unit       8448670
Magazine BoxMagazine SpringMagazineFloorPlate   
Hammer Spring    8448611Safety Selector Lever      9381367-SBolt Catch  8448628Bolt Catch Roll Pin   MS16562-119Bolt Catch Plunger       8448634
Magazine  Catch      8448638
Bolt Catch Spring8448633
Buffer Assembly   8448615
Action Spring    8448629
Buffer Retainer8448582Buffer RetainerSpring   8448583
LowerReceiver9349102-S
ReceiverExtension8448581
Buttcap Spacer12597640
Takedown Pin Spring8448586   
Takedown Pin8448584   
Takedown Pin Detent   8448585   
Buttstock9349121Buttplate9349130ButtplateScrew9349128
AccessDoorAssembly8448658Rear SwivelScrew9349120Access DoorHinge Pin8448655AccessDoorHinge8448653RearSlingSwivel8448652
Safety Detent Spring8448516
Lock WasherMS35335-61Pistol Grip ScrewAN501D416-18
Pistol Grip9349127
Safety Detent8448631
Hammer andTrigger Pins8448609  MagazineCatch Button   8448636
     Trigger    Guard   Pivot Roll PinMS16562-35
Trigger GuardAssembly8448587
Disconnector Spring  8448594Disconnector   9349114-STrigger   8448592-STrigger Spring        8448593
Pivot Pin  8448621
Pivot Pin Spring   8448586
Pivot Pin Detent    8448585
  MagazineCatch Spring  8448637
FIRESAFE
FOR 20 BARRELLED RIFLE• Caliber .223 Rem. (5.56 Mm)• Mode of Fire: Safe / Semi-Automatic• 30 Round Magazine• 39.25 Length Overall•  20 Barrel Length• Rifling - 1 in 9 / Right Hand Twist• Weight w/o Mag. - 8.27 Lbs. (3.75 kg)
DISASSEMBLY VIEWS - Bushmaster XM15 E2S Rifle
Lower Receiver / Magazine Groups 
						

							®
PLEASE PRACTICE SAFE FIREARMS HANDLING!
FUNDAMENTAL RULES FOR SAFE GUN HANDLING
®
ALWAYS KEEP THE GUN POINTED IN A SAFE DlRECTlON.
©1999 Bushmaster Firearms, Inc.