Spikes Tactical Assembled AR-15 Upper Receiver

Spikes Tactical Complete Upper Receiver, 223 Rem/556NATO, 14.5 in Barrel (16 in OAL with Pinned Brake), Mid-length Gas System, Fits AR Rifles, Black, Flat Top Receiver, No Sights, 12 in CRR Quad Rail, Dynacomp Muzzle Brake, No Mags STU5050-CQ2D

Geissele Automatics Super Duty Assembled AR-15 Upper Receiver - BLEMULA

SPIKES TACTICAL Complete Upper 5.56x45 16" Black Mid-length AR15

AERO PRECISION M5 308 Assembled Upper Receiver | Kodiak Brown Anodized

Geissele Automatics Super Duty Center Tab MK16 Assembled AR-15 Upper Receiver - 9.3" - DDC - BLEMULA

AERO PRECISION M5 308 Win Assembled Upper Receiver | OD Green

Guntec USA AR15 Upper Receiver Compatible With AR-15 Accessories