Lone Wolf Distributors Black Oxide match grade replacement barrels are manufactured from the highest grade mill select 416 stainless forgings. CNC machined and heat treated, providing a life time of service and unparalleled accuracy at an affordable price. The standard groove and land rifling make this an excellent choice for those who wish to shoot lead, plated or jacketed bullets. Can be used in factory ported or stock pistols. Intended for use in the Glock 19 pistol only. Threaded 1/2 x 28 to fit Gemtech suppressors (or similar).