Daniel Defense 16" 5.56 NATO CHF Carbine Length 1:7 Lightweight Contour AR-15 Barrel

Ballistic Advantage Performance Barrel 5.56x45mm 13.70", Black - Compact and Efficient Barrel - BABL556036F

FN America AR-15 16" Barrel 556NATO 1:7 Twist Button Broached, Black - 20100039

Faxon Firearms Mid-Length Button Rifled Gunner Barrel 5.56x45mm 16", Black

FN America AR-15 16" Barrel 1:7 Twist Button Broached, Black - 20100046

Faxon Firearms Mid-Length Button Rifled Pencil Barrel 5.56x45mm 16", Black

Faxon Firearms Duty Carbine-Length Button Rifled Gunner Big Bore Barrel .450 Bushmaster 16", Black