Proof Research PR15 6mm ARC 20" Carbon Fiber Barrel 1:7.5 Twist

Proof Research's steel barrels are produced in-house from double-stress relieved 416R stainless steel. This pre-hardened chromium steel is ideally suited for match grade rifle barrels. Each barrel is drilled, contoured and reamed to bore diameter. It is then cut rifled, lapped, and inspected via borescope. This ensures an extremely consistent and accurate finished product.Proof Research's Carbon Fiber Barrel manufacturing process begins with full-profile, match-grade 416R stainless steel barrel blanks that are then turned down to a significantly reduced profile greatly reducing weight. This reduced contour barrel is then wrapped with high-strength, aerospace-grade carbon fiber impregnated with a proprietary matrix resin developed by Proof's advanced composites division, PROOF Research ACD. FeaturesMatch-grade accuracyUnprecedented durabilitySingle point cut rifled and twice hand lapped