CZ-USAINTEGRAL 17 HMR SUPPRESSOR•Caliber: .17 HMR•Diameter: 0.866" •OAL: 16.9"•Wt.: 30.8 oz.•Suppressor is built into the standard CZ 455 Varmint barrel utilizing the patented Screw-in Baffle System •Tune baffle lengths to match the load of your choice •Thread the baffles in to pre-designated locations within the forward threaded suppressor portion of the barrel using the included tool •Lightweight 7075 aluminum baffles & endcap •Black Cerakote finish •Patented baffle thread cuts through accumulated crud for regular cleanings •NOTE: CZ Recommends regular cleanings every 300-rounds due to the dirty nature of rimfire ammo