7.62 x 39mm

Diamondback

Diamondback 7.62x39mm 16-Inch Carbine-Length Medium Profile Barrel, 1:9.5 Twist, Nitride

Diamondback

Diamondback 7.62x39mm 10-Inch Nitride Carbine-Length Barrel

Diamondback

Diamondback DB 7.62x39mm 7-Inch Pistol-Length Heavy Barrel, Nitride, 1:9.5 Twist