Smith & Wesson Model 63 J Frame Cylinder Stop & Spring .22 LR, Part# 6381
$12.99
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Smith & Wesson Model 63 J Frame Cylinder Stop & Spring .22 LR, Part# 6381
$12.99
Smith & Wesson Model 63 Cylinder Stop & Spring – Part# 6381
This is a genuine factory Smith & Wesson cylinder stop and spring for the J Frame Model 63 revolver chambered in .22 Long Rifle. An old-style used part in serviceable condition — a cost-effective solution for restoring proper cylinder lockup on your Model 63.
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: 6381
- Part Name: Cylinder Stop & Spring
- Condition: Used, factory original (old style)
- Frame: J Frame
- Caliber: .22 Long Rifle (rimfire)
- Includes: Cylinder stop + cylinder stop spring
- Function: Locks cylinder in barrel alignment at moment of firing
Model Compatibility
| Model | Caliber | Frame | Compatible |
|---|---|---|---|
| Model 63 | .22 LR (rimfire) | J Frame | ✅ Yes |
| Model 43 / 43C | .22 LR (rimfire) | J Frame | ⚠️ Verify fitment |
| Model 317 | .22 LR (rimfire) | J Frame | ⚠️ Verify fitment |
| Model 34 | .22 LR (rimfire) | J Frame | ⚠️ Verify fitment |
| Model 36 / 60 | .38 Special / .357 Mag | J Frame | ⚠️ Verify fitment — same frame, centerfire |
| K / L / N Frame | Various | Larger frames | ❌ Different frame size |
Note: Cylinder stops are frame-specific and not interchangeable between J, K, L, or N Frame revolvers. Parts may also vary between rimfire and centerfire J Frame configurations. Always confirm your exact model before ordering. Model numbers are stamped on the frame behind the yoke when the cylinder is swung out. Pre-1957 revolvers may not have a model number — contact us with your serial number for assistance.
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.