Additional information
| Action | Double action only |
|---|---|
| Barrel length | 2.125 inches |
| Caliber | 357 magnum |
| Capacity | 5 rounds |
| Frame material | Stainless steel |
| Finish | Satin stainless |
| Grip type | Rubber |
| Sights | Fixed |
| Safety | Internal lock |
| Weight | 34 ounces |
| Model | 640 |
| Type | Revolver |
| Series | Internal hammer |
| Frame size | Small |