K939 Smith & Wesson K Frame Model 66 Internal Parts .357 Magnum revolver-parts Identifying Your Model:

Identifying Your Model:

Genuine Smith & Wesson factory replacement cylinder assembly engineered specifically for X Frame Model 500 revolvers

The Model 637's light weight makes trigger control even more important for managing recoil and maintaining accuracy

introduced in 1979

357 Magnum Mainspring Stirrup

K939 Smith & Wesson K Frame Model 66 Internal Parts .357 Magnum revolver-parts Identifying Your Model:K939 Smith & Wesson K Frame Model 66 Internal Parts . 357 Magnum Please call or email with any questions! We sell Smith & Wesson pistol and revolver used, new & new old stock refurbished & new parts. Shoot us an email or give us a call for all your S&W Gun needs USA Guns And Gear 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