The Smith & Wesson Model 351 PD is a 7-shot .22 WMR J-frame revolver with an Airlight scandium alloy frame. It offers the highest capacity in the J-frame family in a caliber usable for small game and light defense. Type: Revolver Action: Double-Action Caliber: .22 WMR Capacity: 7 Year introduced: 2005, USA Weight: 10.8 oz Overall length: 6.38" Status: Discontinued Intended use: Concealed Carry and Small Game