J168 Smith & Wesson Used J Frame Model 649-3 Bodyguard .357 Magnum Mainspring St JFRAME31U Loads 10 rounds at a

Loads 10 rounds at a time

or hunting applications where fast target acquisition is critical

1/2" Arbor Hole: Fits standard bench grinders and polishing motors for immediate use

Requires disassembly and assembly by a qualified gunsmith with experience in revolver mainspring installation

Saves time and thumb fatigue at the range

J168 Smith & Wesson Used J Frame Model 649-3 Bodyguard .357 Magnum Mainspring St JFRAME31U Loads 10 rounds at aJ168 Smith & Wesson Used J Frame Model 649 3 Bodyguard . 357 Magnum Mainspring Stirrup Please call or email with any questions! 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