Ballistic Advantage Premium Black Series, 223 Wylde, 16 Mid Tac Gov With OPS 12 Profile, Black, Mid Length Gas System, AR15 BABL223016PQ This 223 Wylde chambered 16 inch barrel is machined from 416R Stainless Steel with a QPQ finish. Their Premium Black Series Barrels feature a Nickel Boron Coated Extended M4 Feed Ramp Extension. This barrel features a Mk12 Mod H profile with a longer .750" profile dimension necessary for proper installation of the OPS Inc 12th model collar and suppressor.