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MIL-R-63997B(AR)
The  cyclic  rate  of  fire  for
b.
Cyclic  rate  of  fire.
rifles being fired with 30 round magazines shall be
measured and recorded during the second magazine of
the  first  cycle  and  the  first  magazine  of  every
Cycle rate of fire shall be
ninth  cycle  thereafter.
measured during the fourth or fifth burst from the
magazine.
Firing  shall  be  accomplished  in
4 . 7 . 8 . 4  F i r i n q procedure-
one (1) firing cycle shall be
50 cycles using 30 round magazines.
Cooling of the barrel shall be to the
as specified in TABLE V.
point that it is capable of being held by the bare hand.
Supplemental  cooling  is  permissible  in  the  hand  guard  area.
Firing cyclic.
TABLE V.
30 ROUND
REMARKS
MAGAZINE
Burst  - one complete trigger pull
(3 round
30 rounds
burst) every 5 to 8 seconds.
B u r s t  - one complete trigger pull
(3 round
30 rounds
burst ) every 2 to 5 seconds.
Semi-Automatic  - rate of 10 to 30
rounds
30 rounds
per minute.
Semi-Automatic - rate of 10 to 30
rounds
30 rounds
per minute.
Total
120 rounds
During the 18th and 36th
4.7.8.4.1  Unrestrained  firing.
cycles for 30 round magazines? t h e s e m i - a u t o m a t i c f i r i n g s h a l l b e
conducted outside the firing stand by firing the rifle held in the
hands not touching the shoulder and without restraining the normal
recoil  of  the  rifle.
In the event of a failure of the
4.7.8.4.2  Failure  to  lock.
bolt to lock, the forward assist assembly shall be operated (see
3.3.3.7).
D u r i n g  s e m i - a u t o m a t i c  f i r i n gr r i f l e s
4.7.8.4.3  Doubling.
shall be checked to assure that no doubling occurs (i.e., two
shots  fired  with  a  single  trigger  pull).  Doubling  shall  be
recorded  as  a  malfunction.
No parts shall be altered
4.7.8.4.5 Replacement of Parts.
during  the  test.  Broken  parts  that  affect  function  and  those
parts that are worn to the extent they are unserviceable (see .6.5)
The  contractor  shall  provide  replacement  parts
shall  be  replaced.
as required to complete the test at no additional cost to the
Government.
49

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