K20 Smith & Wesson K Frame Model 12 4" Barrel Blue Used 38 Special Airweight other which includes the Model 638

which includes the Model 638 (shrouded hammer Bodyguard)

or trigger binding

Part Number: 227220000

new style) Model 67 -

Contact us for all your S&W gunsmithing and maintenance needs

K20 Smith & Wesson K Frame Model 12 4" Barrel Blue Used 38 Special Airweight other which includes the Model 638K20 Smith & Wesson K Frame Model 12 4" Barrel Blue Used 38 Special Airweight 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