66159 Smith & Wesson K Frame Model 66 Side Plate & Screws .357 Magnum key lock M&P40 Full Size (

M&P40 Full Size (

0 with genuine Smith & Wesson factory parts

or missing plunger can cause extraction failures

40 S&W 15 rd ✓ Yes M&P 40 Full Size 2

66159 Smith & Wesson K Frame Model 66 Side Plate & Screws .357 Magnum key lock M&P40 Full Size (Part# 66159 Smith & Wesson Revolver K Frame Model 66 Side Plate & Screws Stainless Steel Old Style Used 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