M31 Buffer Spring Cup
This is the M31 Spring Cup used in the Buffer Assembly. This part stops the bolts in the rear position on the M31 Rifle. The other two components in this assembly are the Buffer Washer and the Return Spring (Sold Separately).
M31 End Cap SEMI AUTO, SPRING GUIDE SHORTENED.
M31 FIRING PIN RETURN SPRING
M31 Trigger Spring
M31 Small Parts Kit
M31 Firing Pin Bushing
M31 Safety Spring
M31 Semi-Auto Assembled Receiver (FFL Required)
M31 Firing Pin
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