SOLGW EAST INDIA KIT 5.56 11.5" BLK

Sons of Liberty Gun Works M4-76 5.56 Barreled Upper Receiver - 13.7"

BUSHMASTER QRC Upper 5.56 NATO 16" - Black

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

BATTLE ARMS Authority ELite Upper Recv 5.56 10.5" AR-15 Gray

LBE Unlimited M4 Stripped Upper Receiver, Fits AR15, Black Finish ARSTUP

SPIKE'S TACTICAL Midlength Complete 5.56x45mm NATO LE 16in AR-15 Upper Receiver With 12in CRR QUAD Rail (STU5035-CQ2F)

Heckler & Koch MR762 A4 7.62 NATO Complete Upper Receiver Kit - 16"