J42107 Smith & Wesson J Frame Model 42 Air Weight Hammer Used .38 Special l586n ensuring proper timing and smooth

ensuring proper timing and smooth operation

8 LB Rebound: Maximum reduction

the Model 637 is one of the lightest

0 Confirmed Fit M&P Full Size 9mm /

Part number: 038110000

J42107 Smith & Wesson J Frame Model 42 Air Weight Hammer Used .38 Special l586n ensuring proper timing and smoothJ42107 Smith & Wesson J Frame Model 42 Air Weight Hammer Used . 38 Special Please call or email with any questions! 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