The Shaw AR-15 Heavy Barrel in 6mm ARC (brand part no. AR15HBSS186ARC) gives builders an 18-inch stainless steel tube for the cartridge that brought genuine mid-range precision to the AR-15 platform. Shaw Barrels has made rifle barrels in Pennsylvania for decades, and this heavy-profile blank carries a 5/8×24 threaded muzzle ready for a brake or suppressor mount. The 6mm ARC pushes high-BC 6mm bullets at velocities that hold energy and resist wind well past traditional AR-15 cartridge ranges, making this barrel a strong upgrade for precision gas-gun builds and long-range varmint rigs. Among rifle barrels, this Shaw favors AR builders stretching their platform past 600 yards.

Key Specifications

• The chambering is 6mm ARC.
• The length is 18 inches, a proven balance of velocity and handling for the cartridge.
• The material is stainless steel in a heavy profile.
• The muzzle is threaded 5/8×24 for brakes and suppressors.
• Built as a drop-in AR-15 pattern barrel.

Frequently Asked Questions

What makes 6mm ARC worth a dedicated barrel? It launches high-BC 6mm bullets that hold velocity and buck wind far better than 5.56 at distance, inside standard AR-15 magazine and bolt dimensions.

What else do I need for the conversion? A 6mm ARC bolt and magazines; the cartridge otherwise runs in a standard AR-15 upper.

Buy the Shaw AR-15 6mm ARC Heavy Barrel

Stainless precision for a long-reach AR build is exactly what this Shaw 6mm ARC barrel delivers. Order it from our Lubbock, Texas gun shop for fast shipping.