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James K · February 24, 2014, 02:59 PM

Since your lower is a registered machine gun, anything else is just parts. You can use any upper or parts thereof you want.

Jim

February 24, 2014, 02:59 PM	#6
James K Member In Memoriam Join Date: March 17, 1999 Posts: 24,383	Since your lower is a registered machine gun, anything else is just parts. You can use any upper or parts thereof you want. Jim