The JE Machine Tech PS-BAL7 7.50" Standard Profile 5.56 NATO Pistol Barrel combines precision engineering with rugged durability for optimal AR15 performance. Constructed from high-grade 4150/4151 CrMoV steel, this barrel is expertly drilled, reamed, and button-rifled to deliver consistent accuracy over extensive use. Enhanced with a pistol-length gas system, it offers reliability that shooters can trust. Platform: AR15 Chambering: .223/5.56x45 NATO Twist rate: 1:7 Overall length: 7.5" Gas system length: Pistol .750 gas block Thread Pitch: 1/2-28 Material: 4150/4151 CrMoV Steel Finishing: Black Nitride Elevate your shooting experience with this exceptional barrel and enjoy a complimentary gas tube with your purchase.