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)

new style) Model 67 -

OEM replacement stirrup for the Smith & Wesson Model 59 9MM semi-automatic pistol

Genuine factory new Smith & Wesson main spring (also called hammer spring) for 1911 Government model pistols

refurbishing

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