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|  MIL-G-45140B
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3.3.3 Targeting and accuracy. At a range of 90 meters (100 yards),
10 consecutive shots shall fall within the 14 x 16 inch rectangle speci-
fied on Drawing C7268261 for targeting; and the 10 shots shall fall within
an 8 inch circle for accuracy. Ammunition shall be government standard
T249E2, caliber .50, practice cartridges conforming to MIL-C-60168.
Testing shall be as specified in 4.5.3.2.1.
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3.3.4 Endurance. The gun shall be capable of firing 2500 rounds
of government standard T249E2, caliber .50, practice cartridges con-
forming to MIL-C-60168, with not more than the number of malfunctions
and unserviceable parts allowed in Table I. Testing shall be as speci-
fied in 4.5.3.2.3.
3.3.4.1 Firing shall be single shots, deliberately spaced at
approximately 2 second intervals, in series not to exceed 100 rounds
using fully loaded magazines. The magazines shall be used in rotation
so that approximately 500 rounds will be fired from each magazine.
3.3.4.2 The barrel shall be cooled to amblent temperature by air
after each series. The gas system and barrel chamber shall be
thoroughly cleaned after each 500 rounds and at the close of each day's
firing. Cleaning and oiling of other partS at 500 rounds is permissible.
No parts shall be altered or replaced during cleaning except that parts
broken or worn to the extent that they are unserviceable shall be
replaced.
(Notes:
)
Table I. Malfunctions and unserviceable parts
Number
permitted in
2500-rounds
Malfunctions
8
Failure to feed (cartridge visible)
Failure to feed (cartridge not visible)
2
Failure to eject cartridge case
4
Total malfunctions for above categories combined
11
Number
permitted in
2500-rounds
Unserviceable parts
2
Extractor
1
Magazine assembly
2
Pin, firing
1
Pin, spring (bolt assembly)
7
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