M31 Semi Auto Charging Block
The M31 Charging Block connects to the stock charging handle but is taller for better engagement into the Semi auto bolt.
M31 Receiver Center Section semi auto
M31 Semi Auto Home Built Receiver Kit
M31 Rear Sight Screw
M31 Shroud Shim
M31 Safety Spring
M31 Semi Auto Receiver Assembly instructions and BATF Approval Letter
M31 Suomi 36 Round Stick Magazine
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