Shaw Barrels AR Barrel Features The Shaw Barrels barrel is chambered in 6mm ARC and built specifically for the AR-15 platform giving builders a precision option for this increasingly popular cartridge. Machined from 416R stainless steel the barrel offers excellent corrosion resistance and machinability two qualities that contribute to long-term accuracy and durability. The 1:7.5 twist rate is matched to the heavier higher ballistic coefficient bullets that 6mm ARC is often loaded with giving the barrel the stabilization needed for long-range performance. At 22 inches the barrel length is tuned to extract strong velocity from the 6mm ARC cartridge which benefits from a longer barrel more than some other AR-chambered rounds. The HBAR profile keeps extra material forward along the barrel helping it resist heat-induced accuracy loss during sustained strings of fire at the range or in competition. A rifle-length gas system paired with this barrel contributes to smoother cycling and reduced felt recoil compared to a shorter gas system. The Bead Blast Matte finish on the 416R stainless steel gives the barrel a low-glare durable surface suited to range and field use alike. Threaded 5/8x24 the Shaw Barrels barrel is ready to accept a muzzle device giving 6mm ARC AR-15 builders a complete precision-oriented barrel option. Shaw Barrels AR Barrel Specifications Manufacturer: Shaw Barrels Model: AR Barrel Caliber: 6mm ARC Barrel Length: 22 Barrel Description: HBAR Profile Barrel Material: 416R Stainless Steel Barrel Finish: Bead Blast Matte Twist Rate: 1:7.5 Thread Pattern: 5/8x24 Weight: 2.9 lbs Available At: GrabAGun