Smith & Wesson K Frame Cylinder Stop & Spring Old Style - 1081C
Smith & Wesson K Frame Cylinder Stop & Spring – Old Style
This factory original Smith & Wesson K Frame Cylinder Stop & Spring (also called the cylinder bolt) is a critical timing component that rises through the frame to engage the cylinder notches, locking the cylinder in perfect alignment with the barrel at the moment of firing. A worn or broken cylinder stop causes cylinder timing failures, skipped chambers, or dangerous misalignment — making this an essential replacement for any K Frame repair or restoration.
Part Details
- Part Number: 1081C
- Manufacturer: Smith & Wesson
- Frame: K Frame (Medium Frame)
- Style: Old Style
- Includes: Cylinder Stop (Bolt) + Cylinder Stop Spring
- Function: Cylinder Lockup / Timing
- Condition: Used – Factory Original, Functional
Model Compatibility
| Model | Caliber | Type | Compatible |
|---|---|---|---|
| 10, 10-10, 12 | .38 Special | Centerfire | ✓ Yes |
| 13 | .357 Magnum | Centerfire | ✓ Yes |
| 14, 15 | .38 Special | Centerfire | ✓ Yes |
| 16 | .32 Long | Centerfire | ✓ Yes |
| 17, K22 | .22 LR | Rimfire | ✓ Yes |
| 18 | .22 LR | Rimfire | ✓ Yes |
| 19 | .357 Magnum | Centerfire | ✓ Yes |
| 48 | .22 Magnum | Rimfire | ✓ Yes |
| 64 | .38 Special | Centerfire | ✓ Yes |
| 65 | .357 Magnum | Centerfire | ✓ Yes |
| 66 | .357 Magnum | Centerfire | ✓ Yes |
| 67 | .38 Special | Centerfire | ✓ Yes |
| 617 | .22 LR | Rimfire | ✓ Yes |
| 648 | .22 Magnum | Rimfire | ✓ Yes |
| L Frame models | Various | Various | ✗ Not Compatible – Different cylinder stop |
⚠️ This is the old style K Frame cylinder stop. Interchangeable across centerfire and rimfire K Frame models — not caliber-specific. Verify your revolver uses the old-style configuration before ordering.
Installation Note
Cylinder stop replacement requires side plate removal and timing verification. Professional gunsmith installation is strongly recommended. Improper installation can result in dangerous cylinder misalignment. Always verify cylinder lockup and timing after installation.