Check the listing for details. KIDD .22 Muzzle Brake .875 diameter 1/2" x 28 threading - Lightweight Black. Condition: New. Listed at 65.00 USD. .22 caliber muzzle brake1/2" -28 threadAluminium 2" long x .875" diameter The Kidd .22 muzzle brake can be used on any .22 caliber rifle or pistol with 1/2" -28 threads. The purpose of a muzzle brake is to reduce the felt recoil of the rifle. A .22 caliber shot doesn't generate a great deal of recoil for the shooter but this item will still decrease it slightly. It also adds more weight to the muzzle end and looks great! This muzzle brake is a perfect fit installed on the KIDD Lightweight or Ultra Lightweight Barrel. Educational note: a flash suppressor is intended to hide the flash from the target and a compensator or muzzle brake is meant to direct the gases to reduce the upward climb of the firearm. Packaging includes:Aluminium Black Muzzle Brake