K155 Smith & Wesson Used K Frame Model 1905 M&P 2" .38 Special Barrel Pin 6-Shot Cylinder This comprehensive 4-spring kit includes

This comprehensive 4-spring kit includes a reduced power mainspring and three rebound springs

High-visibility reflective finish

Used part inspected for bore condition and thread integrity

The mainspring (also called the hammer spring) provides the force that drives the hammer forward to strike the firing pin

Every component we sell is genuine OEM—never aftermarket substitutes

K155 Smith & Wesson Used K Frame Model 1905 M&P 2" .38 Special Barrel Pin 6-Shot Cylinder This comprehensive 4-spring kit includesK155 Smith & Wesson Used K Frame Model 1905 M&P 2" . 38 Special Barrel Pin 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