MIL-DTL-63997C
TABLE I. Malfunctions and unserviceable components
Four Weapons (number
Single Weapon
(number permitted in
permitted in 6000
Malfunctions 1/
6000 rounds) 7/
rounds) 7/
Failure of bolt to lock 2/
2
4
Failure to fire
2
4
Failure to feed (from magazine)
4
9
Failure to eject
2
4
Failure to chamber
3
7
Failure to extract
1
2
Bolts fails/hold rear
3
8
All other malfunctions 4/
0
0
Total Above malfunctions combined
9
22
Four Weapons 6/
Minimum Life 5/
Unserviceable Parts 1/
Rounds
Combined
Ejector spring
3,000
2
Extractor spring
2,000
1
Other parts 3/
3,000
1
Total unserviceable parts - (above
3
unserviceable parts combined)
Notes:
1/ All malfunctions and unserviceable parts occurring during the test shall be recorded and
properly identified regardless of whether they are chargeable to the weapon. Malfunctions that
are traceable to components determined unserviceable after meeting minimum life round
requirements may be replaced and charged against the weapon. Once verified that previously
recorded malfunctions are attributable to the unserviceable part, they shall not be counted
against the weapon provided they occurred within the previous 200 rounds of firing.
Malfunctions determined not to be chargeable to the weapon as a result of failure analysis shall
be verified and shall not be counted (see 6.4).
2/ In the event of any failure of bolt to lock malfunction, the forward assist assembly shall be
operated. Failure of the 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/ Other malfunctions include, but are not limited to: occurrence of doubling (two shots fired
with a single trigger pull) during semi-automatic firings; failure to immediately stop firing when
the trigger is released (uncontrolled fire) during burst firing; 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 "BURST") or last trigger pull (when magazine is
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