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This Lone Wolf Arms 9mm conversion barrel is intended for Glock 22 and 31 pistols. It lets you shoot 9mm ammunition from a 40 S&W or 357 Sig pistol. The barrel measures 5.03 inch, 128 mm, and is threaded 1/2 x 28; a thread protector is included. It is a ready-to-use drop-in fit that requires no gunsmithing or other modifications, and fits Glock Gen3 and Gen4.
Made from mill-select 416 stainless steel, the barrel is CNC machined and heat treated. It has a glass bead, satin finish exterior, button rifling with standard groove and land rifling, and a standard crown. Features include a lock-up area designed for greater shot-to-shot accuracy, tighter dimensions than the original, maximum chamber support, and an improved feed ramp. It can be used with lead, plated, or jacketed bullets in factory ported or stock pistols, and is made in the USA.
For reliable feeding, Lone Wolf recommends using the correct 9mm magazine, such as a Glock 17 9mm magazine. In a Generation 4 Glock, using the standard Glock recoil spring assembly may cause malfunctions; the description recommends a 9mm Glock recoil spring for best results.