Proof Research Carbon Fiber PXT Barrel Blank Features The Proof Research Carbon Fiber PXT Barrel Blank combines next-generation rifling technology with the lightweight performance and precision that have defined PROOF barrels for years. PXT PROOF s Exponential Twist rifling dramatically reduces rifling lead angle and smooths projectile engagement into the bore reducing engraving force and minimizing throat erosion as rounds are fired. This translates into a smoother transition for the projectile and less felt torque during firing improving recoil control and helping shooters stay on target for faster follow-up shots. In controlled testing PXT barrels have shown a 30 to 100 percent increase in barrel life while maintaining the accuracy standards expected from a PROOF barrel. Built around PROOF s proven carbon fiber construction this barrel blank delivers an exceptional stiffness-to-weight ratio reducing overall rifle weight without sacrificing the rigidity needed for precision accuracy. Chambered for .308 Winchester with a 22 inch length a 1:10 twist rate and a Sendero contour this blank is designed for custom rifle builders and gunsmiths crafting lightweight hunting rifles or precision long-range systems. The 2.5 inch breech and 1.20 inch shank diameter give gunsmiths the dimensions needed to properly fit the blank to a chosen action. The Proof Research Carbon Fiber PXT Barrel Blank is available for sale at GrabAGun for builders seeking a premium foundation for their next .308 Win precision rifle project. Proof Research Carbon Fiber PXT Barrel Blank Specifications Manufacturer: Proof Research Model: Carbon Fiber PXT Barrel Blank Caliber: .308 Win Action: Bolt Barrel Material: Carbon Fiber Twist: 1:10 Type: Blank Grooves: 5 Barrel Description: Sendero Barrel Length: 22 Finish: Stainless Weight: 2 lbs 13 oz Available At: GrabAGun