CZ 457/455 HMR Threaded Barrel Features The CZ 457/455 HMR Threaded Barrel drops onto the CZ 457 and 455 action giving owners an easy way to add a second caliber option to a rifle they already own. Chambered in .17 HMR this 20 inch barrel is threaded 1/2x28 at the muzzle allowing the shooter to mount a suppressor or a muzzle brake for reduced report and improved control. That versatility lets one action serve double duty between quiet plinking and small game hunting without buying a second complete rifle. The 20 inch length strikes a practical balance between a full-length sight radius and a barrel that still carries easily in the field. Finished in a durable black nitride coating the barrel resists corrosion from weather handling oils and repeated cleaning cycles better than a standard blued finish. Nitride treatment also adds a measure of wear resistance to the bore and exterior helping the barrel hold its finish through heavy range use. Because it swaps directly onto the existing CZ 457 or 455 action the changeover requires no gunsmithing beyond the standard barrel exchange these rifles are designed for. The CZ 457/455 HMR Threaded Barrel is for sale at GrabAGun for shooters who want a quick factory-pattern way to add a threaded .17 HMR option to their CZ rimfire. CZ 457/455 HMR Threaded Barrel Specifications Manufacturer: CZ Model: 457/455 HMR Threaded Barrel Compatible Hosts: CZ 457 CZ 455 Caliber: .17 HMR Barrel Length: 20 Finish: Black Nitride Threaded: Yes 1/2x28 Available At: GrabAGun