Genuine factory new Smith & Wesson OEM rear sight plunger/detent spring for K, L, N, and X Frame revolvers. This small but critical spring sits behind the elevation and windage plunger/detent ball in the rear sight body, providing the tension that creates the crisp, positive clicks you feel when adjusting your sight. A worn or broken spring results in mushy, inconsistent adjustments that won't hold zero — replacing it restores the precise, repeatable sight movement your revolver was designed to deliver.
| Frame | Example Models | Compatibility |
|---|---|---|
| K Frame | 14, 15, 16, 17, 18, 19, 48, 53, 66, 67, 617 | ✓ Compatible — all adjustable sight variants |
| L Frame | 581, 586, 681, 686 | ✓ Compatible — all adjustable sight variants |
| N Frame | 24, 25, 27, 28, 29, 57, 58, 624, 625, 627, 628, 629, 657 | ✓ Compatible — all adjustable sight variants |
| X Frame | 460, 500 | ✓ Compatible — all adjustable sight variants |
| J Frame | All models | ✗ Not compatible — different rear sight assembly |
This spring works in conjunction with the plunger/detent ball and the rear sight body. If you're rebuilding or restoring your rear sight, you may also need: