Proof Research 130384 AR-Style Barrel 6mm ARC 20" 1:7.5 Twist Stainless - Rifle +1 Gas System

The Proof Research 130384 AR-Style Barrel is a precision 20" replacement barrel chambered in 6mm ARC, engineered for builders seeking match-grade accuracy from a standard AR-15 platform. Cut from stainless steel with a stainless finish, this barrel brings Proof Research's well-known blend of accuracy, consistency, and corrosion resistance to the 6mm ARC cartridge.

The 1:7.5" twist with 4 grooves stabilizes a broad range of 6mm ARC bullet weights, making the 130384 well suited to paper punching, hunting, and extended-range shooting. Its Rifle +1 length gas system uses a .750" gas journal with a .093" gas port for dependable cycling of the 6mm ARC cartridge.

The muzzle is threaded 5/8x24, ready to accept your choice of muzzle brake, compensator, or suppressor. Whether you are completing a precision AR build or replacing a worn factory barrel, the Proof Research 130384 delivers the quality serious shooters expect from the brand.