MIL-DTL-71186A
3.4.9.1 Trigger guard motion. The trigger guard shall move from its closed position to its
fully open position (resting against the pistol grip) and back without binding.
3.4.9.2 Trigger guard open retention. The trigger guard shall be securely retained in the
open position against the pistol grip by the trigger guard spring pin.
3.4.9.3 Trigger guard closed retention. The trigger guard shall be securely retained in the
closed position by the trigger guard spring loaded detent.
3.4.10 Pivot pin.
3.4.10.1 Pivot pin motion. The pivot pin shall move between its extreme in and extreme
out positions without binding.
3.4.10.2 Pivot pin retention in extreme in position. The pivot pin shall be securely
retained in the extreme in position by spring action of the detent.
3.4.10.3 Pivot pin retention in extreme out position. The pivot pin shall be securely
retained in the extreme out position by spring action of the detent.
3.4.11 Takedown pin.
3.4.11.1 Takedown pin motion. The takedown pin shall move between its extreme in and
extreme out positions without binding.
3.4.11.2 Takedown pin retention in extreme in position. The takedown pivot pin shall be
securely retained in the extreme in position by spring action of the detent.
3.4.11.3 Takedown pin retention in extreme out position. The takedown pin shall be
securely retained in the extreme out position by spring action of the detent.
3.4.12 Pistol grip.
3.4.12.1 Pistol grip retention. The pistol grip shall be securely retained on the lower
receiver.
3.4.12.2 Pistol grip position. The pistol grip shall not interfere with operation of the
selector lever.
3.4.13 Buttstock assembly.
3.4.13.1 Buttstock assembly retention. The buttstock assembly shall not rotate on the
lower receiver extension.
3.4.13.2 Buttstock assembly motion. Pressure on the release lever (rear end) towards the
buttstock shall withdraw the lock pin allowing movement between the extended and extracted
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