5.56x45mm NATO SBR Uppers

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

Maxim Defense PDX AR-15 Complete Upper Receiver 5.56x45mm 5.5" Barrel Arid

Sons of Liberty Gun Works M4-L89 Complete Upper 5.56 11.5 Threaded Barrel w/ L89 Rail

FightLite Industries MCR Mission Configurable Rifle Complete Upper 5.56 12.5 Threaded Barrel

Colt Firearms LE6933EPRII Complete Upper 5.56 11.5 Threaded Barrel

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

Faxon Duty Series AR-15 Barrel 5.56x45mm NATO 13.9" Gunner Contour 1:8" Twist Nitride

Faxon Duty Series AR-15 Barrel 5.56x45mm NATO 12.5" Gunner Contour 1:8" Twist Nitride

Faxon Duty Series AR-15 Barrel 5.56x45mm NATO 10.5" Pencil Contour 1:8" Twist Black Nitride

Faxon Duty Series AR-15 Barrel 5.56x45mm NATO 10.5" SOCOM Contour 1:8" Twist Black Nitride

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

Ballistic Advantage AR-15 Barrel 5.56x45mm NATO 10.3" Government Contour 1:7" Twist Phosphate

Ballistic Advantage Modern Series 5.56 NATO 12.5 Barrel for AR-15

Ballistic Advantage AR-15 Barrel 5.56x45mm NATO 10.5" Government Contour 1:7" Twist QPQ

Faxon Duty Series Gunner AR-15 Barrel 5.56x45mm NATO 11.5" Gunner Contour 1:8" Twist QPQ Black

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

Wilson Combat AR-15 Barrel 5.56x45mm NATO 11.3" Medium Taper 1:7" Twist Stainless

Daniel Defense AR-15 Barrel 5.56x45mm NATO 10.3" Government Contour 1:7" Twist Mil-Spec Heavy Phosphate

Ballistic Advantage Performance Series AR 15 Barrel 5.56 12.3 Barrel

Ballistic Advantage AR-15 Barrel 5.56x45mm NATO 10.3" Hanson Contour 1:7" Twist QPQ with Low Profile Gas Block

Daniel Defense DD4 RIII S AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 11.5" Barrel Flat Dark Earth

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

Rosco Manufacturing Bloodline AR-15 Barrel 5.56x45mm NATO 14.5" M4 Contour 1:7" Twist Black Nitride