20" 6mm ARC 4150 Rifle Medium 1:7.5 Twist Nitride Barrel

20" 6mm ARC 4150 Rifle Medium 1:7.5 Twist Nitride Barrel Stretch your shots. Stay light. Shoot true. The 20" 6mm ARC Rifle Barrel is designed for shooters pushing their AR-15 platform well past traditional 5.56 capabilities. Made from 4150 Chrome Moly Vanadium steel and treated with a durable nitride finish, this barrel delivers outstanding heat resistance, corrosion protection, and smooth operation over extended use. Optimized for long-range precision, the 1:7.5 twist rate is ideal for stabilizing heavy 6mm ARC projectiles (80-108 gr), making it a top choice for PRS, hunting, or DMR builds. The rifle-length gas system ensures smoother recoil and more consistent cycling, while the medium profile balances stiffness and weight for repeatable accuracy. Threaded 5/8x24, it's suppressor-ready right out of the box. Features 4150 CrMoV Steel - Built for strength, heat tolerance, and longevity Black Nitride Finish - Corrosion-resistant and low-maintenance 1:7.5 Twist Rate - Ideal for heavy, high-BC 6mm ARC bullets Rifle-Length Gas System - Smooth cycling and reduced recoil Medium Contour - Balanced for precision and manageable weight 5/8x24 Threaded Muzzle - Suppressor and brake compatible Specifications Caliber: 6mm ARC Barrel Length: 20" Twist Rate: 1:7.5 RH Gas System: Rifle Length Gas Block Journal: 0.750" Muzzle Thread: 5/8x24 Profile: Medium Finish: Nitride / Melonite Platform: AR-15 Weight: 26 oz Origin: Made in the USA