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 Semi Auto Receiver Assembly instructions and BATF Approval Letter
M31 Rear Sight Assembly
M31 Semi-Auto Assembled Receiver (FFL Required)
M31 Receiver Center Section semi auto
M31 Shroud Shim
M31 Small Parts Kit
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