Anderson 5.56 NATO 7.5" 1:7 Twist Pistol Government Profile Barrel

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

DMA Inc. XTS AR-15 5.56 NATO 4150 CMV Barrel - Carbine - Government - 10.5" - 1:7

DMA Inc. XTS AR-15 5.56 NATO 4150 CMV Barrel - Pistol - SOCOM - 7.5" - 1:7

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

FN AMERICA AR-15 Rifle Length Barrel 5.56 NATO 20" Black

Faxon Firearms Carbine-Length Button Rifled Pencil Barrel w/Pinned Gas Block 5.56x45mm 10.50", Black

VKTR Industries VK-1 Upper 10.5in Nitride Barrel 1 7 Twist 5.56 NATO AR Compatible