Firing pin cracked

alanint · 06-10-2014, 07:22 AM

Axl,
You are correct. If the rear area of this firing pin had sheared off, the gun would have fired from pressure pushing the balance of the pin forward, not back, since the firing pin retained is held fixed inside the breech block. The rear portion of the FP may have been held by the sear, but the front portion would have traveled along with the breech block and caused a slam fire and most likely a full-auto dump since the FP would have protruded from the breech block under spring pressure.

06-10-2014, 07:22 AM	#15
alanint User Join Date: Mar 2008 Location: Marco Island, Florida Posts: 4,867 Thanks: 1,685 Thanked 1,917 Times in 1,193 Posts	Axl, You are correct. If the rear area of this firing pin had sheared off, the gun would have fired from pressure pushing the balance of the pin forward, not back, since the firing pin retained is held fixed inside the breech block. The rear portion of the FP may have been held by the sear, but the front portion would have traveled along with the breech block and caused a slam fire and most likely a full-auto dump since the FP would have protruded from the breech block under spring pressure.