The Model 648 is the stainless K-Frame chambered for .22 WMR, replacing the discontinued blued Model 48. It brought corrosion-resistant construction to the .22 Magnum revolver market, serving sport shooters and small-game hunters. Type: Revolver Action: Double-Action Caliber: .22 WMR Capacity: 6 Year introduced: 1989, USA Weight: 40.5 oz Overall length: 11.125" Status: Discontinued Intended use: Sport, Hunting, Target