JS192F Smith & Wesson J Frame Model 640 .236" Trigger .38 Special Model K22 Featuring a blue finish and

Featuring a blue finish and designed specifically for 2-inch barrels

This critical internal part rotates the cylinder during trigger operation

Need Help Finding the Right Part

ensuring proper timing and reliable operation

Hammer Spur Width:

JS192F Smith & Wesson J Frame Model 640 .236" Trigger .38 Special Model K22 Featuring a blue finish andJS192F Smith & Wesson J Frame Model 640 . 236" Trigger . 38 Special 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 still find the part you need with the serial # . If this is the case contact us and we will need a