The Model 351PD is a seven-shot J-frame revolver chambered in .22 Winchester Magnum Rimfire, built on a scandium alloy frame with a titanium cylinder. At 10.6 ounces, it provides seven rounds of .22 WMR in one of the lightest possible packages. The .22 WMR cartridge offers meaningfully more energy than .22 LR from short barrels. Type: Revolver Action: Double-Action Caliber: .22 WMR Capacity: 7 Year introduced: 2004, USA Weight: 10.6 oz Overall length: 6.13" Status: Discontinued Intended use: trail, utility, backup