This .223 Wylde chambered 17.7 inch barrel is machined from 416 Stainless Steel with a bead blasted finish. Our Premium Series Barrels feature a FailZero Nickel Boron Coated Extended M4 Feed Ramp Extension.Hanson Series Barrels feature our proprietary BA Hanson profile and include a pinned lo-pro gas block. Hanson barrels are not designed to work with aftermarket piston kits.Additional InfoLength17.7Material416R Stainless SteelProfileHansonFinishBead BlastedGas System LengthMid-LengthGas Block Journal1.03 Gas Block Seat for .750 Low Profile Gas Blocks OnlyTwist Rate1:8 inchesMuzzle1/2x28 ThreadedWeight31Other InfoHP and MPI TestedHanson Series BarrelsBA Hanson Series Barrels provide a lightweight feel without lightweight limitations. Every barrel in the BA Hanson Series was designed specifically to its length and caliber to yield the best results with every aspect taken into consideration. It is truly ideal for how the AR was meant to perform. With the BA Hanson Profile, we found a more efficient way to harness a bullets energy while limiting felt recoil considerably. The balanced feel and overall performance of a Hanson barrel will create a more organic relationship between you and your rifle. It will simply be an extension of you!- Clint Hanson