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 638 is an innovation of the Model 38 Bodyguard Airweight which integrates time-tested features of the original with modern advancements. This model has an aluminum alloy frame with a matte sliver finish, stainless steel barrel and cylinder, integral front and fixed rear sights, and an external hammer. It also has black grip.
| Manufacturer | Smith and Wesson |
| Model | 638 |
| Caliber | 38 Special |
| Type | Revolver |
| Action | DA/SA |
| Capacity | 5 |