66185CC Smith & Wesson K Frame Model 66 .357 Magnum Trigger .310" Used Part .45 Colt ctg The hammer block rises into

The hammer block rises into position to block the hammer's forward travel when the trigger is not pulled

Note: Wood grain and shade variations are natural and will vary from piece to piece

Part Number: MBU42

or upgrading a 624

66185CC Smith & Wesson K Frame Model 66 .357 Magnum Trigger .310" Used Part .45 Colt ctg The hammer block rises into66185CC 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