Diamondback 762X39C10M50B95R OEM Replacement 7.62X39mm 10" Carbine-Length Black Nitride 4150 Chrome Moly Vanadium Steel Replace Your Barrel, Or Finish Your Build With This 10" Black Nitride Barrel From Diamondback! Made Of 4150 CMV With a Carbine-Length Gas System. Length: 10" Model: OEM Replacement Twist: 1:9.50" Finish: Nitride Barrel Type: Carbine Length Medium Profile