223 Remington SBR Barrels & Uppers

Daniel Defense MK18 AR-15 Pistol Complete Upper Receiver 5.56mm NATO 10.3" Barrel Flat Dark Earth

Daniel Defense DDM4v7 S AR-15 Complete Upper Receiver 5.56x45mm NATO 11.5" Barrel

HK MR556 A4 AR-15 Complete Upper Receiver 5.56x45mm NATO 11" Barrel

Battle Arms Workhorse AR-15 Pistol Barreled Upper Receiver 5.56x45mm NATO 9.5" Barrel

LBE Unlimited Ready Build Kit Complete Upper 5.56 / .223 Rem 14.5 Threaded Barrel Mid Length Handguard

LBE Unlimited AR-15 Ready Build Kit Complete Upper 5.56 13.7 Barrel

Midwest Industries AR-15 Pistol Barreled Upper Receiver 5.56x45mm NATO 10.5" Barrel

LBE Unlimited AR-15 Ready Build Kit Complete Upper 5.56 / .223 Rem 7.5 Barrel

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

LBE Unlimited Ready Build Kit Complete Upper 5.56 / .223 Rem 12.5 Barrel Mid Length Gas Handguard

Sons of Liberty Gun Works Precision SPR Barrel .223 Wylde 14.50", Black

Sons of Liberty Gun Works M4-L89 Upper Receiver Group 5.56 / .223 Rem 14.5 Threaded Barrel

Luth-AR Lightweight Barrel 5.56 11.5 Threaded Barrel

FightLite Industries DFX Complete Upper 5.56 / .223 Rem 12.5 Threaded Barrel w/ 100 M27 Links

Ballistic Advantage AR-15 Barrel 5.56x45mm NATO 14.5" Government Contour 1:7" Twist QPQ

Daniel Defense AR-15 Barrel 5.56x45mm NATO 14.5" Government Contour 1:7" Twist Mil-Spec Heavy Phosphate

Ballistic Advantage AR-15 Barrel 5.56x45mm NATO 11.3" Hanson Contour 1:7" Twist QPQ with Low Profile Gas Block

Ballistic Advantage Performance Series Barrel 5.56/.223 Rem 13.9 1/2x28

Rosco Manufacturing Bloodline AR-15 Barrel 5.56x45mm NATO 14.5" USASOC Contour 1:7" Twist Black Nitride

Ballistic Advantage Performance Hanson 5.56 NATO 14.5 AR-15 Black

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

Sons of Liberty Gun Works Liberty Fighting AR-15 Barrel 5.56x45mm NATO 14.5" Medium Contour 1:7" Twist

Colt AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 14.5" Barrel CMR M-LOK Handguard

LBE Unlimited Cold Hammer Forged Barrel 5.56 7.5 Threaded Barrel Pistol Length