Smith & Wesson J-Frame revolver is designed to fire a full power round and is as simple and easy to use as it is reliable. The Model 642, is a variation of the Model 42 Centennial Airweight which integrates the time-tested features of the original with modern advancements. It is a small-frame, concealed-hammer revolver for concealed carry. This model has an aluminum alloy frame, stainless steel barrel and cylinder, integral front and fixed rear sights, and black synthetic grip.