The Model 547 is a K-frame revolver chambered in 9mm Luger that extracts the rimless cartridge without moon clips using a patented internal extractor mechanism. This unique system allowed patrol officers to use standard 9mm pistol ammunition in a revolver. Type: Revolver Action: DA/SA Caliber: 9mm Capacity: 6 Year introduced: 1980, USA Weight: 32 oz Overall length: 9.5" Status: Discontinued Intended use: Duty, Carry