The Walther WMP SD Semi-Auto Rimfire Pistol represents Walther's first foray into the world of .22 Magnum handguns, and the results are as excellent as you'd expect. Like Walther's centerfire pistols, the WMP (Walther Magnum Pistol) epitomizes the company's commitment to TEQ (Trigger, Ergonomics, Quality). Featuring an optics-ready slide with 2 adapter plates for Trijicon RMR and Shield RMSc footprints, the WMP offers best-in-class ergonomics along with Walther's patented ambidextrous reloading mechanism the Quad Release. With 4 separate activation points, including the European-style paddle release and ambidextrous button releases, the Quad Release ensures unmatched adaptability for shooters of all preferences. The WMP SD features a ported slide that helps to tame the already-manageable recoil of the .22 Magnum (also called .22 WMR) round. It also features a threaded barrel with thread protector. The trigger is as exceptional as you'd expect, breaking at 4.5 lbs. and resetting quickly. Polymer frame, aluminum slide. Dot front sight and adjustable rear sight. Includes 2 magazines. Walther's first .22 Magnum handgun Optics-ready slide with adapter plates for Trijicon RMR and Shield RMSc footprints Threaded barrel with thread protector Ported slide for recoil reduction White dot front sight and adjustable rear sight Quad Release magazine release technology Best-in-class ergonomics