Proof Research PR15 130384 20" 6mm ARC Stainless Steel AR-Style Barrel

Proof Research PR15 130384 20\" 6mm ARC Stainless Steel AR-Style Barrel. This Proof Research PR15 130384 is a stainless steel AR-style barrel chambered in 6mm ARC with a 20-inch length for compatible AR platforms. It features a 1:7.5 twist rate, rifle +1 gas system, .750-inch gas journal, and 5/8\"-24 muzzle threading. - 20-inch stainless steel barrel for AR platforms - 1:7.5 twist rate for 6mm ARC - Rifle +1 gas with 5/8\"-24 muzzle threading Engineered by Proof Research, this PR15 barrel supports precision in demanding AR builds.