M31 Firing Pin Bushing
The M31 Firing pin Bushing for the M31 Semi Auto bolt. This bushing is pressed in to the front of the bolt forming the primer pocket.
M31 Rear Sight Screw
M31 SA Trigger Group Assembly - Service Work
M31 End Cap SEMI AUTO, SPRING GUIDE SHORTENED.
M31 Rear Sight Assembly
M31 Semi-Auto Assembled Receiver (FFL Required)
M31 Buffer Spring Cup
M31 Semi Auto Receiver Assembly instructions and BATF Approval Letter
M31 Hammer Spring
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