Shaw Barrels AR-15 6mm ARC 18" Straight Fluted HBar Stainless Barrel

The Shaw Barrels AR-15 6mm ARC is an 18-inch HBar (heavy barrel) replacement barrel built for the AR-15 platform and chambered in the 6mm ARC (Advanced Rifle Cartridge). It is machined from 416R stainless steel with a bead-blast matte non-glare finish, and features straight fluting cut into the HBar profile for a clean, traditional look along with added surface area for cooling.

The barrel is rifled with a 1:7.5" twist and 6-groove rifling that stabilizes the heavier, high-ballistic-coefficient bullets the 6mm ARC was designed around, making it a strong fit for mid-range hunting and defensive AR-15 builds. At 18" in length, the HBar contour delivers the rigidity needed for consistent accuracy while keeping total weight at roughly 2.20 lbs for the bare barrel.

This Shaw Barrels replacement barrel installs on any standard AR-15 upper and is aimed at builders, gunsmiths, and end users setting up an AR-15 in 6mm ARC. The straight-fluted HBar profile pairs a classic look with the corrosion resistance of 416R stainless steel in a matte finish that is at home on a hunting rifle or a duty-oriented carbine.