M31 Semi Auto Receiver Assembly instructions and BATF Approval Letter
This packet includes the steps necessary to build your own M31 semi auto receiver. The BATF letter included lays out the rules for manufacturing and proper marking. Please look at PN M31S-GNPT-XX09-BKXX-RCKT for a complete diagram.
*This Package is for the receiver only, not the complete rifle.
ASR /AR-15 Pistol Grip
M31 Semi-Auto Assembled Receiver (FFL Required)
M31 Receiver Center Section semi auto
M2HB Semi-Auto Receiver Kit
MG34 Feed Cover Axle
M31 FIRING PIN RETURN SPRING
TNW Standard rail billet upper and lower receiver combo
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