Sure, the .22 LR doesn't cause a whole lot of muzzle rise, but if you're a competitor looking for every edge in a rimfire-pistol competition, keeping a muzzle aligned exactly on target gives you an edge. Tactical Solutions has the right stuff in the form of the Pac-Lite Ruger Mk Series Performance Compensator. Designed to work with every variant in the Ruger Mark Series of rimfire pistols, including the 22/45, this Pac-Lite Performance Compensator is guaranteed not only to keep your muzzle aligned exactly onto the target, it'll also help to increase accuracy. Each Tactical Solutions Pac-Lite Performance Compensator is machined from 6061-T6 aluminum and measures 2 inches long, .920 inch wide and weighs 1.7 ounces. The compensator fits all standard 1/2-28 TPI muzzle threads and is treated with an anodized black finish.