The Model 637 is a variation of the Model 37 Chiefs Special Airweight that integrates the time-tested features a +P rated; aluminum alloy frame; stainless steel barrel and cylinder with a matte finish along with a custom wood grip.
| Barrel Length | 1.88" |
| Grips | Finger Grooved Wood |
| Sights | Integral Front/Fixed Rear |
| Frame Size | J-Frame |
| Cylinder Finish | Stainless |
| Barrel Finish | Stainless |
| OAL | 6.30" |
| Frame Description | Aluminum Frame |
| Type | Revolver |
| Action | DA/SA |
| Caliber | 38 Special +P |
| Weight Range | 9 oz to 15.99 oz |
| Hammer Style | Exposed |
| FireArm | yes |
| Capacity | 5 |
| Weight | 14.60 oz |
| Barrel Length Range | 1" to 1.99" |
