Proof Research PR15 PXT 6mm ARC 20" 1:7.5 Twist Carbon Fiber AR-15 Barrel

The Proof Research PR15 PXT is an AR-15 platform barrel chambered in 6mm ARC. The PXT contour pairs a 20-inch length with a 1:7.5 twist rate, and the barrel features Proof Research's signature carbon fiber wrapped stainless steel construction.

Designed for the AR-15 platform, the PR15 PXT brings Proof Research's carbon fiber barrel technology to the modern 6mm ARC cartridge. The 1:7.5 twist rate is optimized to stabilize a wide range of 6mm ARC bullet weights, from lightweight projectiles through heavier match and hunting loads. This barrel is an ideal foundation for a precision AR-15 build chambered in 6mm ARC.