Proof Research Lone Peak Arms Carbon Fiber Prefit Barrel 223 Remington 20" Sendero Contour 1:8" Twist 4 Groove

Overview

The Proof Research Lone Peak Arms carbon fiber prefit barrel is chambered in .223 Remington with a 20-inch barrel length, a Sendero contour, and a 1:8" twist with 4 grooves. Built with match-grade accuracy and durability in mind, the barrel features a core produced in-house from double-stress relieved 416R stainless steel that is drilled, contoured, reamed, cut rifled, lapped, and borescope-inspected. It is wrapped in aerospace-grade carbon fiber using a helical wrapping pattern designed to favor longitudinal thermal diffusivity. This advanced thermal engineering allows the barrel to dissipate heat efficiently along its length and through the wall, resulting in faster cooling times and consistent accuracy over extended strings of fire.

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