The SP22 is a modular semi-automatic pistol manufactured by Walther Sportwaffen and distributed by Smith & Wesson. The SP22 is chambered in .22 LR (5.6 mm) and is designed for sport and competition shooting. It is manufactured with a composite receiver, aluminum housing, and all-steel internal components. Walther has four different models of the SP22: the SP22 M1, SP22 M2, SP22 M3 and SP22 M4, as well as multiple accessories for customizing

The M3 model features a 6-inch (15 cm) match-grade barrel along with an adjustable match trigger. It also has removable Picatinny-style rails on top of, and underneath the housing. The M3 also comes larger polymer grips, and a quick-release magazine catch.