The purchase of an AM15 Upper Receiver requires either (1) an FFL or (2) a copy of your ATF Form 1,2, 3 or 4. We will not sell an AM15 Upper Receiver to anyone that cannot provide documentation to verify that they legally own an M16 machine gun or are engaged in the firearms business with a valid SOT.

The AM15 Upper Receiver fires from an OPEN BOLT using the supplied fire control group, similar to the Colt LMG system. In order to shoot 5.56 using the traditional closed bolt fire control group, the fire control group has to be swapped.