K190 Smith and Wesson K Frame Model 15 Thumb piece Blue Used Part Memorabilia Critical component that secures the

Critical component that secures the cylinder to the crane assembly

Smith & Wesson factory original OEM part

The mainspring controls hammer tension and directly affects trigger pull weight and smoothness

The Model 49 features a steel frame and partially shrouded hammer allowing SA/DA operation

K190 Smith and Wesson K Frame Model 15 Thumb piece Blue Used Part Memorabilia Critical component that secures theK190 Smith and Wesson K Frame Model 15 Thumb piece Blue Used . 38 Special Revolver Pistol Gun Part. 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