The PROOF Research PXT Carbon Fiber Barrel Blank (brand part no. 154304) is a 24-inch .308-caliber barrel blank in a Sendero contour, built around PROOF’s PXT rifling geometry for custom rifle builders and gunsmiths who want a lightweight, long-lasting foundation for a precision rifle. PROOF Research engineers the PXT (Proof Exponential Twist) rifling to reduce engraving force and throat erosion versus conventional rifling geometry, and controlled testing has shown a 30 to 100 percent increase in barrel life while holding PROOF’s usual accuracy standard. The barrel’s carbon fiber construction delivers an exceptional stiffness-to-weight ratio, cutting overall rifle weight without sacrificing performance. Among rifle barrels, this PXT blank favors builders assembling lightweight hunting rifles or long-range precision systems.

Key Specifications

• Sized for .308-caliber projectiles.
• Measures 24 inches in a Sendero contour.
• The twist rate is 1:9, using PROOF’s PXT rifling geometry.
• The breech measures 2.5 inches with a 1.20-inch shank diameter.
• Built with carbon fiber construction over a steel liner.
• Weighs approximately 3 pounds.
• Testing shows a 30 to 100 percent increase in barrel life over conventional rifling.

Frequently Asked Questions

What does PXT rifling do differently? It reduces engraving force and throat erosion compared to conventional rifling, extending barrel life.

How much does the barrel weigh? About 3 pounds, thanks to its carbon fiber construction.

Buy the PROOF Research PXT Carbon Fiber Barrel Blank

A lightweight, long-lasting foundation for a custom .308 build is exactly what this PXT barrel blank delivers. Order it from our Lubbock, Texas gun shop for fast shipping.