This 22" 22 ARC barrel is machined from 416 Stainless Steel with a bead blasted finish. Our Premium Series Barrels feature a Nickel Boron Coated Extended M4 Feed Ramp Extension.Featuring functionally aggressive flutes and crisp, clean lines, BA Fluted barrels deliver the perfect balance of weight and rigidity. Utilizing six and eight flute designs we've achieved weight reduction up to and exceeding 16 ounces. Confidently lighten your kit without sacrificing an ounce of accuracy.Specifications:Length: 22"Material: Hardened 416R Stainless SteelProfile: BullFinish: Fluted Bead BlastedTwist Rate: 1/7"Gas System Length: Rifle +1Gas Block Journal: .875"Muzzle: 1/2x28 ThreadedWeight: 50 oz