JS139 Smith & Wesson J Frame Model 640 Internal Parts Used .38 Special .45 ACP and cylinder gap

and cylinder gap

Lathe-Center #5

Sewing Needle

Proper hand function ensures each chamber aligns precisely with the barrel for safe

Condition: Factory new OEM assembly

JS139 Smith & Wesson J Frame Model 640 Internal Parts Used .38 Special .45 ACP and cylinder gapJS139 Smith & Wesson J Frame Model 640 Internal Parts Used . 38 Special This Listing Includes: Mainspring, Bolt, Rebound Slide & Spring, 1 Pin, Cylinder Stop and Bushing. How to determine the model number of your Smith & Wesson Revolver. Swing out the cylinder , check behind the yoke on the frame for a MODEL NUMBER. Model numbers began in 1957 58. So if there is no model number then your revolver may be older than 1957 58. In this case we can possibly