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 BOLT ASSEMBLY
M31 Shroud Shim
M31 Semi Auto Home Built Receiver Kit
M31 Small Parts Kit
M31 Receiver Center Section semi auto
M31 Semi-Auto Assembled Receiver (FFL Required)
M31 End Cap SEMI AUTO, SPRING GUIDE SHORTENED.
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