M31 Charging Handle Return Spring
This M31 Charging Handle Return Spring keeps the cocking handle assembly in the forward position after cocking the rifle.
M31 Firing Pin
M31 Safety Spring
M31 Lower Receiver Section Machined
M31 FIRING PIN RETURN SPRING
M31 Receiver Center Section semi auto
M31 Buffer Spring Cup
M31 Trigger Spring
M31 Semi Auto Receiver Assembly instructions and BATF Approval Letter
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