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 BOLT ASSEMBLY
M31 Shroud Shim
M31 Small Parts Kit
M31 Semi Auto Home Built Receiver Kit
M31 Rear Sight Screw
M31 Charging Handle Return Spring
M31 80% Receiver Tube
M31 End Cap SEMI AUTO, SPRING GUIDE SHORTENED.
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