Proof Research Impact Precision 737R Carbon Fiber Prefit Barrel 338 ARC 16.5" Sendero Contour 1:8" Twist 5 Groove

Overview

The Proof Research Impact Precision 737 prefit barrel is chambered in .338 ARC with a 16.5-inch length and a 1:8-inch twist rate. It features a Sendero contour and is manufactured with a 5-groove rifling pattern. The barrel is constructed using double-stress relieved 416R stainless steel wrapped in aerospace-grade carbon fiber. This barrel design utilizes a helical wrapping pattern to optimize longitudinal thermal diffusivity, allowing the barrel to dissipate heat efficiently and maintain match-grade accuracy over extended firing sessions. The high-stiffness-to-weight ratio of the carbon fiber composite provides durability and thermal performance superior to traditional steel-only barrels.

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