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MIL-R-63997B(AR)
During  semi-automatic  firing,  rifles shall be checked to
4.7.6.
assure  that  no  doubling  occurs  (i.e., two shots fired with a
Doubling shall be recorded as a malfunction
single  trigger  pull).
and shall be cause for rejection.
Manually examine function of
4.7.5.3.4  Manual  examination.
magazine catch and visually examine f u n c t i o n  o f  b o l t  c a t c h  i n
Depressing of magazine catch button
assisting  magazine  ejection.
shall cause the magazine assembly to be ejected, with spring
assist  from  bolt  catch,  without  binding.
Malfunctions that are not
4.7.5.3.5  Malfunctions.
attributable  to  rifles  as  a  result  of  failure  analysis  and
verified by the Government representative shall not be counted
against  the  rifle; however, such malfunctions shall be recorded.
The following data shall be re-
RecordinG of data.
4.7.5.3.6
corded:
Number of rifles tested and number of rifles
a.
rejected  per  shift.
Test  data.
b.
Ammunition lot number.
c.
For  each  rifle  that  fails,  record  the  following
data:
d.
1.
Serial  number
Type of malfunction or failure (see 6.5).
2.
Class  of  malfunction  (see  6.5.5).
3.
Round number at which failure occurred.
4.
Type of firing (semi-automatic or burst)
5.
Round number of magazine at which failure
6.
occurred.
Type of magazine used (30 round magazine)
7.
Ammunition
defect
e.
Rifle in which ammunition defect occurred.
1.
Description  of  defect.
2.
,R e j e c t e d
rifles.
4.7.5.4
Rifles  re'jetted  because  of  malfunction
4.7.5.4.1  Correction.
or unserviceable part during the test shall be corrected by the
c o n t r a c t o r and the corrective action shall be recorded. In the
event  the  malfunction  cause  is  classified  as  Class  II  or  Class  III
(see  6.5.5),  the  contractor  shall  immediately  initiate  action  in
accordance  with  4.7.5.5.2.1.
The  rifles  shall  be  retested  by  firing  two
4.7.5.4.2  Retest.
(2) thirty round sequences in accordance with 4.7.5.3.1 and the
The  rifle  shall  operate  without
cyclic rate shall be recorded.
malfunction  or  unserviceable  parts  and  shall  meet  the  cyclic  rate
of  fire  requirements.
38

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