Proof Research Lone Peak Arms Prefit Barrel 223 Remington 26" Stainless Heavy Competition 1:7" Twist 4 Groove

Overview

The Proof Research Lone Peak Arms prefit barrel is chambered in .223 Remington with a 26-inch barrel length and a stainless finish. Produced in-house from double-stress relieved 416R stainless steel—a pre-hardened chromium steel ideally suited for match-grade rifle barrels—each barrel is drilled, contoured, reamed to bore diameter, cut rifled, lapped, and inspected via borescope for consistent accuracy. Engineered for thermal performance, the design incorporates aerospace-grade carbon fiber featuring a helical wrapping pattern that favors longitudinal thermal diffusivity along the length of the barrel. This configuration allows the barrel to dissipate heat efficiently away from the bore rather than insulating it, moving heat through the wall thickness to promote faster cooling and maintain precision over extended strings of fire.

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