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Smith & Wesson Model 640
Not sure what you're looking at? Identify it from its markings · What the stamps on the barrel mean
Photo: Mike Searson — CC BY-SA 3.0 · license · via Wikimedia Commons
Technical Specifications
| Type | Service Revolver |
|---|---|
| Country of origin | United States |
| Manufacturer | Smith & Wesson |
| In service | 1989–present |
| Unit cost | $729.00 |
| Weight | 22.58 oz.; 15.8 oz for alloy version |
| Length | 6.56" |
| Barrel length | 2.125" |
| Caliber | .357 Magnum · .38 Special · .38 Special +P |
| Action | DAO |
| Feed | 5-round cylinder |
| Range | 22.86 meters |
| Maximum range | 45.72 meters |
Data from Smith & Wesson Model 640 (Wikipedia, 2026-09-22). Text licensed under CC BY-SA. Image: CC BY-SA 3.0 — Mike Searson.
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Date This Firearm
Own one? Estimate its year of manufacture from the serial number using collector and author transcriptions of the factory ledgers. S&W publishes no serial chart.
Smith & Wesson serial number lookup →