Lead and Steel AR-15 Barrel Features The Lead and Steel AR-15 barrel is turned from 4150 chrome moly vanadium steel a material chosen for its strength and heat resistance under sustained firing. The QPQ black nitride finish adds a layer of corrosion and wear resistance beyond what a standard phosphate coating offers while also improving the barrel s overall durability in the field. A pencil profile keeps the barrel lightweight which benefits shooters building a nimble maneuverable rifle for home defense or general-purpose use. M4 feed ramps are machined into the barrel extension area to ensure reliable feeding from a wide range of magazines. At 14.5 inches with a mid-length gas system this barrel strikes a balance between a shorter more compact rifle and the smoother more consistent cycling that a mid-length gas system provides compared to a carbine-length system. The 1:7 twist rate stabilizes a wide range of 5.56 bullet weights from lighter varmint loads up through heavier 77 grain match projectiles. A 1/2x28 threaded muzzle allows the installation of a muzzle device or suppressor to suit the builder s needs. This barrel is a solid foundation for an AR-15 build focused on reliability and consistent accuracy. Lead and Steel AR-15 Barrel Specifications Manufacturer: Lead and Steel Caliber: 5.56mm Barrel Length: 14.50 Barrel Type: Mid-Length Barrel Description: Pencil Profile Twist Rate: 1:7 Thread Pattern: 1/2x28 Barrel Features: M4 Feed Ramps Available At: GrabAGun