Smith & Wesson K Frame Model 12 Airweight .38 Special Hand - Part# 12129A (Used) trigger Model 66-5

Model 66-5

45 Caliber Used Part

Enhanced Reliability: Extra power firing pin and extractor springs for improved performance

The manufacturer specifically lists these "dash" versions as confirmed fits:

Quick Reloads: 6-round capacity for faster cylinder loading and unloading

Smith & Wesson K Frame Model 12 Airweight .38 Special Hand - Part# 12129A (Used) trigger Model 66-5Smith & Wesson K Frame Model 12 Airweight . 38 Special Hand (Cylinder Pawl) Part Number: 12129A Condition: Used Old Style Caliber: . 38 Special What Is the Hand? The hand (also called the pawl or cylinder hand) is a critical internal component of the revolver's action. It engages the cylinder ratchet and rotates the cylinder to the next chamber with each trigger pull or hammer cock. A worn or damaged hand can cause cylinder timing issues, misfires, or