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 Semi Auto Charging Block
M31 Semi Auto Home Built Receiver Kit
M31 Rear Sight Screw
M31 Spring Mount Forward Sear
M31 Shroud Shim
M31 Safety Spring
M31 Semi Auto Receiver Assembly instructions and BATF Approval Letter
M31 Semi-Auto Assembled Receiver (FFL Required)
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