PROOF 154106 BOLT 224 16.5 8TW PXT

PROOF Research PXT carbon fiber barrel blanks combine next-generation rifling technology with the lightweight performance and precision that have defined PROOF barrels for years. PXT (PROOF Exponential Twist) is a complete rethinking of conventional rifling geometry and twist progression engineered to reduce engraving force, minimize throat erosion, and create a smoother transition as the bullet travels through the barrel. The barrel blank measures 16.5 inches with an 8-twist rate and is designed for precision rifle builds requiring lightweight and high-performance barrels.