S&W K Frame M&P 1st Model 4-Screw Main Spring .38 Colt – Part# MPC13 semi-auto pistol parts require no maintenance

require no maintenance

Genuine Smith & Wesson parts ensure proper fit and reliable function

Authentic Smith & Wesson N Frame Model 28-2 Cylinder Assembly

Proper fitting and timing are essential for reliable extraction

Part# J116 Smith and Wesson J Frame Model 42

S&W K Frame M&P 1st Model 4-Screw Main Spring .38 Colt – Part# MPC13 semi-auto pistol parts require no maintenanceSmith & Wesson K Frame Military & Police 1st Model Main Spring 4 Screw, Old Style A rare factory original main spring (mainspring) for the earliest production K Frame revolvers. This part was sourced from a Military & Police 1st Model revolver (Serial# 3312) chambered in . 38 Colt one of the earliest S&W hand ejector revolvers ever produced. The main spring powers the hammer, providing the force needed to strike the firing pin with sufficient energy