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1) This PROOF Research PR15 128657 is a 16-inch carbon fiber barrel for AR-style platforms chambered in 6mm ARC. It features a match-grade 416R stainless steel core wrapped in aerospace-grade carbon fiber for enhanced performance.
Engineered for AR-style rifles using Grendel Type II bolt, this PR15 barrel delivers strength, durability and precision in demanding conditions. It includes 1:7.5 twist rate, rifle-length gas system, .750 gas journal and 5/8-24 muzzle threading.
