3 . 3 . 2 4 . 2 . 1 Process qualification rifles. The accuracy of process
q u a l i f i c a t i o n rifles shall be such that when fired 10-shot targets at
a range of 100 yards, the average figure of merit (FM) shall not be
more than 3.2 inches and the standard deviation shall not be more than
0 . 6 inch when tested as specified in 18.104.22.168 and 22.214.171.124 using selected
l o t s of ammunition (see 126.96.36.199).
188.8.131.52.2 Individual rifle acceptance. me accuracy of individual
r i f l e s shall be such that when fired 10-shot targets at a range of 100
yards, the figure of merit (FM) shall be not more than 3.2 inches when
t e s t e d as specified in 184.108.40.206 and 220.127.116.11, using selected lots,of
a m m u n i t i o n (see 18.104.22.168). When using unselected lots of ammunition
( s e e 22.214.171.124), the accuracy of individual rifles shall be in accordance
w i t h the acceptance criteria established by firing the ammunition to be
u s e d for testing in the process qualification rifles (see 126.96.36.199, 188.8.131.52
a n d 184.108.40.206).
3 . 3 . 2 5 I n t e r c h a n g e a b i l i t y . U n l e s s otherwise specified on the
d r a w i n g s , all parts shall be interchangeable. (In normal assembly opera-
t i o n s there shall be no objections interposed to preferential assembly
o f parts provided that all parts are dimensionally acceptable.) Rifles
a n d repair parts shall be capable of meeting the interchangeability
t e s t s specified in 220.127.116.11 and 4.5.8.
3 . 3 . 2 6 Endurance. Rifles shall be capable of passing a 6,000
round endurance test as specified in 18.104.22.168 and 4.5.9 with not more
than the number of malfunctions and unserviceable parts allowed in
T a b l e I, and the average cyclic rate of fire for the entire test shall
b e within the limits specified in 3.3.23.
3.4 Marking. Each rifle shall-be clearly marked in accordance with
the applicable drawings and MIL-W-13855.
3.5 Workmanship. Workmanship shall be in accordance with the
workmanship requirements of MD-W-13855.