Walther Magazine Pistol in .22 Winchester Magnum Rimfire. First modern semi-auto pistol purpose-built for .22 WMR; optics-ready slide; positions as small-game and trail gun. Type: Pistol Action: Semi-Automatic Caliber: .22 WMR Capacity: 15 Year introduced: 2021, Germany Weight: 25 oz Overall length: 7.8" Status: Active Intended use: target, self_defense