Smith & Wesson Model 51 J Frame Cylinder Stop & Spring .22 Magnum, Part# 5181
$18.99
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Smith & Wesson Model 51 J Frame Cylinder Stop & Spring .22 Magnum, Part# 5181
$18.99
Smith & Wesson Model 51 Cylinder Stop & Spring – Part# 5181
This is a genuine factory Smith & Wesson cylinder stop and spring for the J Frame Model 51 revolver chambered in .22 Magnum Rimfire (.22 WMR). An old-style used part in serviceable condition — a cost-effective solution for restoring proper cylinder lockup on your Model 51.
The cylinder stop (also called the cylinder bolt) rises to lock the cylinder in precise alignment with the barrel at the moment of firing. A worn, chipped, or broken cylinder stop results in poor lockup, cylinder wobble, and degraded accuracy or reliability. Includes the cylinder stop spring.
Part Details
- Part Number: 5181
- Part Name: Cylinder Stop & Spring
- Condition: Used, factory original (old style)
- Frame: J Frame
- Caliber: .22 Magnum Rimfire (.22 WMR / .22 M.R.F.)
- Includes: Cylinder stop + cylinder stop spring
- Function: Locks cylinder in barrel alignment at moment of firing
Model Compatibility
| Model | Caliber | Frame | Compatible |
|---|---|---|---|
| Model 51 | .22 Magnum (.22 WMR) | J Frame | ✅ Yes |
| Model 53 | .22 Jet / .22 LR | J Frame | ⚠️ Verify fitment |
| Model 63 | .22 LR (rimfire) | J Frame | ⚠️ Verify fitment — different rimfire caliber |
| Model 34 | .22 LR (rimfire) | J Frame | ⚠️ Verify fitment — different rimfire caliber |
| Model 36 / 60 | .38 Special / .357 Mag | J Frame | ⚠️ Verify fitment — centerfire |
| K / L / N Frame | Various | Larger frames | ❌ Different frame size |
Note: The Model 51 is chambered in .22 Magnum Rimfire (.22 WMR) — not .22 LR. It is a distinct J Frame configuration and parts may not interchange with other .22 LR J Frame revolvers (Model 63, 43, 317, 34). Cylinder stops are frame-specific and not interchangeable between J, K, L, or N Frame revolvers. Always confirm your exact model before ordering. Model numbers are stamped on the frame behind the yoke when the cylinder is swung out.
Installation
Cylinder stop replacement requires side plate removal and disassembly of the lock work. Cylinder timing must be verified after installation to ensure safe, reliable lockup. We recommend installation by a qualified gunsmith.
Questions about fitment? Call or email us — we're happy to help.