Proof Research PXT Zermatt Origin Carbon Fiber Prefit Barrel 308 Winchester 16.5" Sendero Contour 1:10" Twist

Overview

The Proof Research PXT Zermatt Origin carbon fiber prefit barrel is chambered in .308 Winchester with a 16.5-inch length and a 1:10-inch twist. These barrels utilize PXT (Proof Exponential Twist) rifling geometry, designed to reduce engraving force and throat erosion while smoothing projectile engagement. This technology promotes improved barrel life—demonstrating a 30-100% increase in testing—while reducing felt torque for better recoil control. Constructed with an aerospace-grade carbon fiber wrap over the barrel, these prefit units are lightweight, offering up to 64% less weight than steel barrels of a similar contour, and feature enhanced heat dissipation. The barrels arrive chambered and threaded, allowing for shoulder-fit installation to the action without the need for additional machining.

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