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 Lower Receiver Section Machined
M31 Semi Auto Receiver Assembly instructions and BATF Approval Letter
M31 Semi-Auto Assembled Receiver (FFL Required)
M31 Spring Mount Forward Sear
M31 Rear Sight Screw
M31 Safety Spring
M31 Suomi 36 Round Stick Magazine
M31 SEMI AUTO BOLT ASSEMBLY
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