The WMP (Walther Magnum Pistol) is a .22 WMR (Winchester Magnum Rimfire) semi-automatic pistol, the first full-size pistol chambered in this caliber from a major manufacturer in decades. Type: Pistol Action: Semi-Automatic Caliber: .22 WMR Capacity: 15 Year introduced: 2022, Germany Weight: 19.2 oz Overall length: 7.3" Status: Active Intended use: Small Game, Pest Control, Sporting