The Model 648 is an eight-shot all-stainless K-frame revolver chambered in .22 WMR with a 6-inch barrel, providing the higher-energy rimfire Magnum cartridge in a target-grade revolver. The K-frame geometry and stainless finish make it durable and practical for sustained field and range use. Eight rounds of .22 WMR from a 6-inch barrel produces approximately 300 ft-lbs of muzzle energy. Type: Revolver Action: Double-Action Caliber: .22 WMR Capacity: 8 Year introduced: 1989, USA Weight: 42 oz Overall length: 11.13" Status: Active Intended use: target, varmint, utility