Proof Research 101261 AR-Style 308 Win 16 in Intermediate Length Gas System 1:10 in Twist 5 Grooves, 5/8-24 tpi, Carbon Fiber Wrapped, Rifle Barrel

Overview

The Proof Research AR-style barrel is chambered in 308 Win and features a 16-inch length with a 1:10-inch twist rate. This match-grade barrel is constructed using a 416R stainless steel blank that is turned down and wrapped in high-strength, aerospace-grade carbon fiber impregnated with a proprietary matrix resin. This construction method reduces weight by up to 64% compared to traditional steel barrels of similar contour. Designed for thermal performance, the barrel utilizes a helical wrapping pattern that enhances longitudinal thermal diffusivity, allowing for more efficient heat dissipation. This results in barrels that cool faster and maintain accuracy during high-volume fire with reduced harmonic vibration and no significant point-of-impact shift. The barrel features a 5/8-24 tpi threaded muzzle, 5 grooves, and an intermediate-length gas system.

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