Proof Research PXT 284 Cal 16.5" 1:8 Twist Sendero Carbon Fiber Prefit Bolt Action Barrel Blank

The Proof Research PXT prefit barrel blank is engineered for custom bolt-action rifle builders seeking match-grade accuracy with reduced weight. This 16.5" Sendero-contour blank is chambered in .284 caliber (7mm) with a 1:8 twist rate, well-suited to a wide range of high-BC 7mm hunting and long-range bullet weights.

The PXT line is purpose-built as a precision prefit for the Zermatt Origin bolt-action platform, featuring a 2.5" PXT breech and a 1.20" shank diameter for a clean drop-in fit with no additional machining required. The Sendero contour balances rigidity and reduced weight, coming in at just 2 lbs 6 oz - up to 64% lighter than traditional all-steel barrels of similar profile.

Constructed with a 416R stainless steel core wrapped in high-modulus carbon fiber, the PXT barrel delivers improved heat dissipation for cooler operation, enhanced shot-to-shot consistency, and exceptional stiffness for repeatable accuracy. The carbon fiber sleeve also provides extreme temperature resistance during extended strings of fire.

Manufactured by Proof Research in the USA, this PXT barrel blank is built for precision rifle builders chasing match-grade performance and lightweight handling in a custom 7mm Zermatt Origin build.