Results for Colt 5.56x45mm NATO Upper Receivers

Colt AR-15 Barreled Upper Receiver 5.56x45mm NATO 11.5" Barrel

Colt Firearms LE6933 Complete Upper 5.56 / .223 Rem 11.5 Threaded Barrel w/ Surefire SF3 Flash Hider

Colt Firearms LE6933 Enhanced Patrol Rifle II Complete Upper 5.56 11.5 Threaded Barrel w/ HUXWRX Flash Hider

Colt LE6921SOCOM 5.56mm 14.5" Heavy Bbl KAC Rail Matech BUIS Matte Black Upper Receiver Conversion Kit LE6921SOCOMCK

Colt M4 to M5 PDW 5.56 x 45mm 10.3" Heavy Bbl Matte Black Conversion Kit CM556-10H-CK

Colt M4 to M5 Carbine 5.56 x 45mm 14.5" Heavy Bbl Matte Black Conversion Kit CM556-14H-CK

Colt M4 to M5 Carbine 5.56 X 45mm 16.1" Bbl Matte Black Conversion Kit CM556-16-CK

M16 R0901 5.56 Complete Upper Receiver Groups - M16 Upper Group 20in M16 Handguard Stripped

M16 R0901 5.56 Complete Upper Receiver Groups - M16 Upper Group 20in Moe Stripped

M4 5.56 Upper Receiver Groups - M4 Le6933 Upper Group 11.5'''' Stripped

M4 5.56 Upper Receiver Groups - M4 Le6921 Upper Group 14.5in Stripped

Colt LE6933EPRII-PRO 5.56mm 11.5" Bbl Matte Black Metal MBUS Sights HuxWerks Muzzle Device Upper Receiver Conversion Kit LE6933-EPRII-PRO-HUX-CK

Colt LE6933EPRII-SF3-CK 5.56mm 11.5" Bbl Matte Black MBUS Sights Surefire Muzzle Device Upper Receiver Conversion Kit LE6933-EPRII-SF3-CK

Colt Monolithic AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 14.5" Barrel

Colt Assembled AR-15 Upper Receiver Aluminum Black

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6944 Upper Group 14.5in Stripped

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6943 Upper Group 11.5in Stripped

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6945 Upper Group 10.3in Stripped

Colt 223 Rem/ 556 NATO M4 Feed Ramps Upper Black

Colt's Manufacturing Upper, 223REM/556NATO, Black Finish, Dust Cover, Forward Assist, M4 Feed Ramps SP63528

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6940 Upper Group 16in Stripped

Ar15a4 Upper Rcvr, Flattop, Mod. Carb

Ar15a4 Upper Rcvr Assembly, Carbine

Colt's Manufacturing LE6920 AR 15 5.56 NATO Complete Upper