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 Small Parts Kit
M31 Buffer Spring Cup
M31Trigger Only Assembly
M31 Semi-Auto Assembled Receiver (FFL Required)
M31 Firing Pin
M31 Rear Sight Assembly
M31 End Cap SEMI AUTO, SPRING GUIDE SHORTENED.
M31 Safety Spring
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