S&W J Frame Models 36, 37, 38, 42, 49, 60, 63, 317 Trigger MIM 228770000 model 10 Installation requires partial disassembly of

Installation requires partial disassembly of your S&W J-Frame revolver to access the hammer spring (mainspring)

Replace if worn

Model 49 (steel frame)

Compatibility: N Frame Model 629 (new style)

Why Upgrade to a White Outline Rear Sight

S&W J Frame Models 36, 37, 38, 42, 49, 60, 63, 317 Trigger MIM 228770000 model 10 Installation requires partial disassembly ofDesigned for Smith & Wesson J Frame Models including 36, 37, 38, 42, 49, 60, 63, 317, 331, 332, 337, 340, 342, 351PD, 360, 360PD, 442, 631, 632, 637, 638, 640, 642, and 649, these MIM new style trigger offer precision crafted pistol parts, ideal for expert level maintenance and upgrades. Part# 228770000 Smith and Wesson Factory New Part Please call or email with any questions! How to determine the model number of your Smith & Wesson Revolver. Swing