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 Safety Spring
M31 Spring Mount Forward Sear
M31 Suomi 36 Round Stick Magazine
M31Trigger Only Assembly
M31 Semi Auto Receiver Assembly instructions and BATF Approval Letter
M31 FIRING PIN RETURN SPRING
M31 Charging Handle Return Spring
M31 Rear Sight Assembly
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