Proof Research PR-15 PXT Carbon Fiber Barrel 6mm ARC 18" 1:7.5 Twist

The Proof Research PR-15 PXT barrel is an advanced AR-15 platform barrel chambered in 6mm ARC with an 18-inch length and a 1:7.5 twist rate. Built with Proof Research's proprietary PXT (PROOF Exponential Twist) rifling technology, this barrel features a progressive twist design engineered to reduce engraving force, minimize throat erosion, and maximize precision. Compatible with standard AR-15/PR-15 platforms. Constructed with a carbon fiber wrapped profile for reduced weight without sacrificing rigidity or accuracy.