JS139 Smith & Wesson J Frame Model 640 Internal Parts Used .38 Special j32n Model 351PD (

Model 351PD (

Includes:-bolt-plunger-spring

or as backup components for your revolver

Eye-Catching Design: High contrast graphics for maximum impact

Factory OEM Smith & Wesson N Frame Cylinder Stop & Spring

JS139 Smith & Wesson J Frame Model 640 Internal Parts Used .38 Special j32n Model 351PD (JS139 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