66185CC Smith & Wesson K Frame Model 66 .357 Magnum Trigger .310" Used Part 4505 this exposed hammer is precision-machined

this exposed hammer is precision-machined for reliable ignition and smooth operation

44 Magnum cartridges

Model-specific design - Engineered for Model 19 dash 3 through 6

38 Special Used Old Style

Manufacturer: Smith & Wesson (OEM)

66185CC Smith & Wesson K Frame Model 66 .357 Magnum Trigger .310" Used Part 4505 this exposed hammer is precision-machined66185CC Smith & Wesson K Frame Model 66 . 357 Magnum Trigger . 310" Wide Spur MIM Used Part New Style 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 this is the case