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Barrel  assembly  straightness.
Up
Rifle, 5.56MM: M16A2
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High pressure resistance.



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MIL-R-63997B(AR)
The forward assist
Forward  assist  assembly.
3.3.3.7
assembly  shall  operate  through  its  full  range  of  travel  without
When depressed and released, it shall return under
binding;
spring  action  to  a  fully  outward  position  with  the  pawl  completely
disengaged  from  the  bolt  carrier.
Depressing  and  releasing  the
forward assist shall cause progressive movement of the bolt
carrier  assembly  into  the  battery  position.
The compensator shall be fastened
Compensator.
3.3.3.8
securely to the barrel in accordance with the applicable drawings.
The  front  sling  swivel  shall
be
Front  slinq  swivel.
3.3.3.9
securely retained to the front sight assembly by the rivet and
shall  pivot  freely  through  its  full  range  of  travel.
c a r r i e r group.
3.3.4
Bolt
The bolt carrier and
Key  and  bolt  carrier  assembly.
3.3.4.1
key assembly shall move through i t s f u l l r a n g e o f t r a v e l w i t h o u t
The carrier key shall engage the
binding in the upper receiver.
gas tube freely when the bolt carrier moves in the forward
The bolt carrier key screws shall be torqued and staked
position.
in accordance with the applicable drawings.
Firing pin.
The  firing  pin  shall  be  retained  in  the
3.3.4.2
The  firing
bolt  and  bolt  carrier  assembly  by  the  retaining  pin.
pin  shall  move  freely  through-its  full  range  of  travel  in  the  bolt
The firing pin protrusion shall be a maximum of
carrier  assembly.
The chromium plating of
.036 inches and a minimum .028 inches.
the  fixing  pin  shall  be  free  of  nodules,  flaking,  stripping,  anode
burns and evidence of etched base steel, except as specified on
the  applicable  drawing.
The charging handle shall move
3.3.4.3
Charging  handle.
freely  through  its  full  range  of  travel  in  the  upper  receiver.
When the charging handle is placed in the forward position it
shall engage and lock securely in the upper receiver-
The bolt assembly shall be retained
Bolt  assembly.
3.3.4.4
in the bolt
carrier by the bolt cam pin and shall move through its
*
o f  t r a v e l .-  T h e c a m p i n h o l e s h a l l b e s w a g e d i n
full  range
accordance
with  the  applicable  drawings  to  prevent  improper
assembly of
the bolt cam pin in the bolt assembly.
The  extractor  shall  be  retained  in  the
3.3.4.4.1  Extractor.
The extractor shall move through its
bolt bv the extractor Pin.
full range of travel under spring action without binding in the
bolt and shall be capable of engaging and extracting cartridge
cases from the barrel chamber when the rifle is function fired or
manually  operated.
7

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