Proof Research Carbon Fiber PXT Barrel Blank Features The Proof Research Carbon Fiber PXT Barrel Blank is engineered around PXT PROOF Exponential Twist rifling geometry a complete rethinking of conventional twist progression designed to reduce engraving force and smooth projectile engagement into the bore. This reduces wear and felt torque during firing giving builders improved recoil control and the ability to stay on target more effectively between shots. In controlled testing PXT barrels have demonstrated a 30 to 100 percent increase in barrel life while holding to the accuracy standards PROOF barrels are known for. The carbon fiber construction delivers an exceptional stiffness to weight ratio reducing overall rifle weight without sacrificing performance downrange. At 20 with a 1:8 twist rate and a Sendero contour this blank measures a 2.5 breech and a 1.20 shank diameter giving gunsmiths a precise known foundation to chamber and finish. Weighing just 2 lbs 14 oz the blank keeps a finished rifle light enough for long carries in the backcountry without sacrificing the stiffness needed for repeatable accuracy. Designed specifically for custom rifle builders this blank offers a premium starting point for lightweight hunting rifles and high performance precision long range systems alike. PROOF s reputation for carbon fiber barrel construction makes this blank a trusted choice for builders seeking consistency and durability in their next project. Proof Research Carbon Fiber PXT Barrel Blank Specifications Manufacturer: Proof Research Model: Carbon Fiber PXT Barrel Blank Caliber: .224 Cal Barrel Length: 20 Twist Rate: 1:8 Contour: Sendero Breech: 2.5 Shank Diameter: 1.20 Material: Carbon Fiber Weight: 2 lbs 14 oz Available At: GrabAGun