Battle Arms Development ONE:1 Barrel Features The Battle Arms Development ONE:1 Barrel is threaded at the muzzle giving Glock 19 owners the ability to mount a compensator or a suppressor without sending the pistol out for custom gunsmithing. Fluting along the barrel s length reduces overall weight while increasing surface area for faster heat dissipation during extended range sessions. Because it is a direct fit for Glock 19 Gen 3 Gen 4 Gen 5 and 19X frames the ONE:1 drops into an existing slide with no modification required. The black finish matches factory Glock finishes closely keeping the upgraded pistol s appearance clean and consistent. Battle Arms Development has built its reputation since 2009 on pushing the boundaries of small arms design and manufacturing from its Henderson Nevada headquarters and that same precision machining standard carries through to this barrel. Chambered in 9mm the ONE:1 is built to the tight tolerances handgun shooters expect for reliable function and consistent accuracy. Whether the goal is adding a suppressor for range use mounting a compensator for competition or simply upgrading to a fluted threaded barrel this barrel gives Glock 19 owners a straightforward path to more capability from their existing pistol. Battle Arms Development ONE:1 Barrel Specifications Manufacturer: Battle Arms Development Model: ONE:1 Barrel Caliber: 9mm Color: Black Barrel Description: Threaded and Fluted Compatible Hosts: Glock 19 Gen 3/4/5 19X Barrel Length: 4 Available At: GrabAGun