The .223 Wylde Barrel is one of the most popular caliber options for the AR-15 platform. It’s popularity is because it shoots both civilian .223 Rem ammo, and military 5.56 NATO ammo. Our .223 Wylde has a chamber throat that is tighter than the 5.56 achieving better accuracy but still reliable and functional with 5.56 ammunition. Paired with our tunable gas block, you’ll have smooth cycling and easy tunability. Our Black Nitrided DI barrels include a Black Nitride tunable gas block and are made in Idaho, U.S.A. Features Profile: 3-Gun Length: 18″ Gas placement: Rifle