The Model 351PD is an Airlite J-Frame chambered for .22 WMR with a 7-shot cylinder. Its scandium alloy frame keeps weight under 11 ounces while the .22 WMR cartridge provides significantly more energy than .22 LR from a snub-nose barrel. Type: Revolver Action: Double-Action Caliber: .22 WMR Capacity: 7 Year introduced: 2004, USA Weight: 10.8 oz Overall length: 6.25" Status: Active Intended use: Carry, Sport