Pre10179 S&W K Frame Pre Model 10 Thumb Piece & Nut Blue Steel Used .310" Trigger Improper installation can result in

Improper installation can result in malfunction or damage

This original old-style unit is a direct OEM replacement

It may also fit other J Frame models with similar specifications - contact us to verify compatibility for your specific revolver

contact us with the serial number and we'll confirm compatibility

Designed for X Frame Model 500 revolvers

Pre10179 S&W K Frame Pre Model 10 Thumb Piece & Nut Blue Steel Used .310" Trigger Improper installation can result inPre10179 S&W K Frame Pre Model 10 Thumb Piece & Nut Blue Steel Old Style Used Part Serial # 344375 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