J190637 Smith & Wesson J Frame Model 637 Revolver Part Used Trigger Assembly .31 .308 Winchester Part Number: K46

Part Number: K46

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Wide Target Spur Design – Enhanced surface area for precise thumb placement and controlled single-action shooting

The grooved face ensures positive finger contact for consistent trigger control

While the finish is blue steel

J190637 Smith & Wesson J Frame Model 637 Revolver Part Used Trigger Assembly .31 .308 Winchester Part Number: K46J190637 Smith & Wesson J Frame Model 637 Revolver Part Used Trigger Assembly . 312" 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 serial