The Smith & Wesson J-Frame has become the most popular small frame personal defense revolver on the market. With decades of reliable performance to its credit, the J-frame line offers models capable of firing .22 LR, .22 Magnum, .38 S&W Special and the more powerful .357 Magnum loads. Smith & Wesson offers these revolvers from their production, M&P, Pro Series, and Classics lines in three diverse hammer designs; the exposed Chiefs Special, fully enclosed Centennial and hammer shrouded. This model features an internal security lock.