Smith & Wesson J-Frame revolvers have had your back since 1950. These small revolvers were designed to fire a full power round and are as simple and easy to use as they are reliable. Available in various calibers and with three diverse hammer designs"" it is no surprise that the Smith & Wesson J-Frame has become the most popular"" small-frame"" defense revolver on the market. The Smith & Wesson Model 51"" debuted in 1960 as the .22/32 Kit Gun Magnum"" a reliable J-Frame revolver designed to be carried inside a hunter or fisherman's kit bag. At the close of the twentieth century"" we took this historic model into the future with the introduction of the Airweight series"" revolvers built with aluminum alloys"" significantly reducing the weight of the previously stainless steel revolver. The Model 351 PD integrates the time-tested features of the original with modern advancements.