MIL-DTL-63997C
trigger is held back, the burst disconnect shall engage on the burst cam. When the burst cam
rotates such that the burst disconnect engages in the deepest notch of the burst cam, the burst
disconnect shall restrain the hammer in the cocked position until the trigger is released. When
the trigger is released, the burst disconnect shall allow the hammer to return to the normal
cocked position (when the hammer is held back by only the trigger). The transfer from the burst
disconnect to the normal cocked position shall cause an audible click as the trigger engages the
hammer.
3.4.8 Trigger.
3.4.8.1 Trigger hammer cocked position. The trigger shall hold the hammer in the
cocked position until the trigger is pulled.
3.4.8.2 Trigger normal position upon full trigger pull. After a full trigger pull (see
6.10.9), the trigger shall return to its normal forward position under spring action.
3.4.8.3 Trigger normal position upon partial pull. After a partial trigger pull (see
6.10.10), the trigger shall return to its normal forward position under spring action.
3.4.9 Trigger guard.
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.
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