WTS Bushmaster M4A3 complete upper, post ban type w/ mini y comp brake. Carbine length ARMS S.I.R. 45c rail system with arms #40 rear flip up sight. This is as factory assembled upper I purchased directly through Bushmaster. Has seen 30 rounds, test fired only. LNIB Invested $1040. Want sell for $SPF including shipping. Email me directly for pics @ firstname.lastname@example.org
UPDATE:I will sale ARMS S.I.R. rail 45c by itself for $335 shipped, and barrel for $150 shipped, or upper reciever with barrel and m4 style handgaurds for $465 shipped.