Black Rifle Depot 10.5" 5.56 NATO 1:7 Twist Carbine Barrel

10.5" 5.56 NATO 1:7 Twist 4150V Black Nitride Carbine Barrel The 10.5" 5.56 NATO Carbine Barrel from Black Rifle Depot is a rugged, high-performance option for AR pistol or SBR builds. Precision-machined from 4150 CMV steel, this barrel is stress-relieved after rifling and treated with a durable black nitride finish by H&M for corrosion resistance and extended barrel life. With a 1:7 twist rate, it stabilizes a wide range of 5.56 NATO bullet weights, while the carbine-length gas system ensures reliable cycling under hard use. Each barrel is drilled, reamed, and contoured on a robotic production line, with strict QC standards that ensure tight tolerances and consistent accuracy. Finished with an M4 feed ramp extension, this barrel is ready for duty-grade performance at an unbeatable value. Specifications 10.5" barrel length 5.56 NATO chamber (also accepts .223 Rem) 4150 CMV steel, stress-relieved 1:7 RH twist rate for optimal bullet stability Black Nitride finish (QPQ by H&M) Carbine-length gas system M4 feed ramp extension Weight: 19.7 oz 100% made in the USA Compliance Note:All NFA/ATF rules apply. Use only with registered SBRs, machine guns, or pistols. Do not install on a rifle-length lower unless paired with a permanently attached muzzle device, bringing total length to 16".