M31 Receiver Center Section semi auto
M31Center Section for the semi auto rifle. Refer to PN M31S-GNPT-XX09-BKXX-RCKT for complete assembly diagram.
M31 Safety Spring
M31 Semi Auto Receiver Assembly instructions and BATF Approval Letter
M31 Firing Pin
M31 Semi Auto Home Built Receiver Kit
M31Pin, Firing Pin Cross PIN QTY 2
M31 Spring Mount Forward Sear
M31 Charging Handle Return Spring
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