Results for 5.56x45mm NATO Upper Receivers

LWRC IC-A5 Flat Dark Earth 5.56mm 10.5-inch

Del-Ton Mid-Length Lightweight Rifle Kit Black 5.56NATO/.223REM 16-inch Upper with Lower parts kit

Radical Arms Upper .223/5.56Nato 16 Barrel Black with a 15Rail

Adams Arms P2 AARS Upper 5.56 NATO / .223 Rem 16 Barrel

Luth-AR 16 in Light Weight Complete Upper Barrel Receiver Assembly - 5.56 1x9 twist MLOK Free Float Handguard Black 16

Global Ordnance Can Launcher Upper w/ 300-Rounds of 5.56 Blanks

Maxim Defense Industries PDX Kit 5.56 5.5 Barrel Upper and Brace

Maxim Defense Industries PDX Kit Flat Dark Earth 5.56 5.5 Barrel 20-Rounds Threaded

Anderson Manufacturing 16 Barrel 5.56/.223 Upper w/Front Sight Base

Colt LE6933EPRII-PRO 5.56mm 16.1" Bbl Matte Black Metal MBUS Sights Surefire Muzzle Device Upper Receiver Conversion Kit LE6933-EPRII-PRO-SF3-CK

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 LE6933EPRII-HUX-CK 5.56mm 11.5" Bbl Matte Black MBUS Sights Hux Werks Muzzle Device Upper Receiver Conversion Kit LE6933-EPRII-HUX-CK

Gemtech GVAC Complete Upper 5.56 / .223 Rem 11.5 Barrel w/ ETM Flash Hider

Del-Ton Heavy Barrel Rifle Kit Black 5.56NATO/.223REM 20-inch

Noveske Complete Upper .223 Rem / 5.56 18 Barrel Gen 3 for AR15

Troy CQB-SPC Upper 5.56mm FDE

Spikes Tactical Complete Upper Black 5.56 16 Barrel

Centurion Arms C4 5.56 Billet AR-15 Upper Receiver

Centurion Arms CM4 5.56 Forged AR-15 Upper Receiver

Centurion Arms AR-15 CM4 Forged 5.56 Stripped Thermal Fit Upper Receiver

Spikea (TM)s Tactical Honey Badger Semi-automatic Lower/Upper Set 223 Rem/556NATO Tactical Grey

Bushmaster 20-inch Predator Upper Receiver Barrel Assembly 5.56mm Black Finish