Shaw Barrels AR Barrel Features The Shaw Barrels AR Barrel is machined from 416R stainless steel a material chosen for the tight tolerances and corrosion resistance it offers over standard chrome moly. Its HBAR profile adds mass along the barrel for better heat management and reduced vibration under sustained fire. The spiral fluting cut into that profile trims weight from the finished barrel while preserving the rigidity a heavy barrel is built to provide. A 1 in 7.5 inch twist rate stabilizes the long high ballistic coefficient bullets that 6mm ARC shooters favor at extended range. Finished in a bead blast matte coating this barrel resists glare and wears evenly over years of range use. Its rifle length gas system placement is suited to the full 22 inch barrel giving smoother cycling and less bolt bounce than a shorter gas system on a barrel this long. A 5/8x24 threaded muzzle accepts standard 6mm ARC compatible brakes comps and suppressors without modification. At 2.60 pounds this barrel is a serious upgrade for AR-15 shooters building a dedicated 6mm ARC precision rifle. Shaw Barrels AR Barrel Specifications Manufacturer: Shaw Barrels Caliber: 6mm ARC Barrel Length: 22 Barrel Material: 416R Stainless Steel Barrel Finish: Bead Blast Matte Barrel Description: Spiral Fluted HBAR Profile Twist Rate: 1:7.5 Thread Pattern: 5/8x24 Gas System: Rifle Length Weight: 2.60 lbs Available At: GrabAGun