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Page Title: Table I. Malfunctions and unserviceable Parts permitted in 6,000 rounds. - Continued
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MIL-R-63997B(AR)
2
In the event of any failure of bolt to lock malfunction,
Failure  of  the
the forward assist assembly shall be operated.
forward assist assembly to remain engaged with the bolt carrier
assembly during manual attempt to lock bolt shall be considered an
additional  malfunction  in  the  category  of  "other  malfunctions".
3
Other  parts  shall  be  limited
to  trigger  spring,  disconnect
springs,  hammer  spring,  extractor
pin  and  extractor.
4
0ther  malfunctions  include,  but  are  not  limited  to:
occurrence  of  doubling  (two  shots  fired  with  a  single  trigger
pull)  during  semi-automatic  firing;  failure  to  immediately  stop
firing  when  the  trigger  is  released  (uncontrolled  fire)  during
b u r s t  f i r i n g ;  failure  to  fire  three  (3)  shots  on  a  complete
trigger  pull  in  burst  mode  other  than  in  the  first  trigger  pull
(when fresh magazine is inserted or when selector is switched to
" B U R S T" ) o r l a s t t r i g g e r p u l l ( w h e n m a g a z i n e i s e m p t i e d ) ; a n d
failure of forward bolt assist assembly to remain engaged with
bolt  carrier  assembly  during  manual  attempt  to  lock  the  bolt,  etc.
5
Minimum life rounds is defined as the minimum service life
of  an  individual  part,  whether  it  is  the  original  part  or  a
replacement part, expressed in the number of weapon rounds fired
For each example, an  extractor
with the part assembled in the weapon.
spring  failing  prior  to  firing  2,OO0  rounds  on  a  new  rifle,  has
The  failure  shall  be  recorded
not met the minimum life rounds.
and shall be cause for test failure.
6
The allowable number of serviceable parts shown for 4
rifles  combined  applies  only  to  parts  failing  after  the  minimum
For example, ejector
life rounds have been fired on the weapon.
springs failing at 3,500 rounds on one rifle, and 4100 rounds on a
second  rifle,  fall  within  the  allowable  limits  of  2  unserviceable
parts on 4 rifles combined however, f a i l u r e  o f  a n  e j e c t o r  s p r i n g
on  a  third  rifle  after  firing  3,000  rounds  which  exceeds  the
allowance,  shall  be  cause  for  test  failure.
7
Each  individual  rifle  tested  shall  not  exceed  the  allowable
number for each malfunction in the list or the test shall have
When  the  rifle  meets  the  individual  allowable
failed.
malfunctions  and  exceeds  the  cumulative  total  allowable
The
malfunctions  for  a  rifle,  the  test  shall  have  failed.
combined four rifles tested shall not exceed the allowable number
for  each  malfunction  in  the  list  or  the  test  shall  have  failed.
When the rifles meet the combined four rifles allowable
malfunctions  in  the  list  and  exceed  the  cumulative  total  allowable
malfunctions  for  four  rifles,  the  test  shall  have  failed.
11

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