Proof Research PXT Defiance Ruckus Carbon Fiber Prefit Barrel 6mm ARC 18" Sendero Contour 1:7.5" Twist

Overview

The Proof Research PXT Defiance Ruckus carbon fiber prefit barrel is chambered in 6mm ARC with an 18-inch length, Sendero contour, and a 1:7.5 rifling twist. It features PXT (Proof Exponential Twist) rifling technology, which reimagines conventional twist progression to reduce engraving force, smooth out projectile engagement, minimize throat erosion, and extend barrel life while enhancing recoil control. Constructed with a high-strength, aerospace-grade carbon fiber wrap over a lightweight core, the barrel provides superior heat dissipation and is up to 64% lighter than steel equivalents. It comes fully chambered and threaded to shoulder directly onto compatible actions.

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