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 Y-Series Striker
M31Trigger Only Assembly
M31 Semi-Auto Assembled Receiver (FFL Required)
M31 Buffer Spring Cup
M31 Firing Pin
M31 Shroud Shim
M31 End Cap SEMI AUTO, SPRING GUIDE SHORTENED.
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