M31 80% Receiver Tube
This tube has a smaller ID than the original M31 machine gun. It is used in the construction of a Semi Auto M31 rifle. The slots on the top and bottom must be machined by the builder per BATF specifications. Refer to PN M31S-GNPT-XX09-BKXX-RCKT for complete diagram.
M31 Receiver Center Section semi auto
M31 Semi Auto Home Built Receiver Kit
M31 Rear Sight Screw
M31 Spring Mount Forward Sear
M31 Shroud Shim
M31 Safety Spring
M31 Suomi 36 Round Stick Magazine
M31 Y-Series Striker
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