“Spike’s Tactical Complete Upper Receiver, 223 Rem/556NATO, 14.5″ Barrel (16″ OAL with Pinned Brake), Mid-length Gas System, Fits AR Rifles, Black, Flat Top Receiver, No Sights, 12″ CRR Quad Rail, Dynacomp Muzzle Brake, No Mags STU5050-CQ2D” has been added to your cart. View cart