Smith & Wesson K Frame Cylinder Stop Bolt Spring & Plunger Assembly Old Style - 1045D
$14.99
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Smith & Wesson K Frame Cylinder Stop Bolt Spring & Plunger Assembly Old Style - 1045D
$14.99
Smith & Wesson K Frame Cylinder Stop Bolt, Spring & Plunger Assembly – Old Style
This factory original Smith & Wesson K Frame Cylinder Stop Assembly is a complete bolt, spring, and plunger unit that locks the cylinder in perfect alignment with the barrel at the moment of firing. Buying this complete assembly simplifies repair by eliminating the need to source the bolt, spring, and plunger separately. A worn or broken cylinder stop assembly causes timing failures, skipped chambers, or dangerous cylinder misalignment.
Part Details
- Part Number: 1045D
- Manufacturer: Smith & Wesson
- Frame: K Frame (Medium Frame)
- Style: Old Style
- Includes: Cylinder Stop (Bolt) + Spring + Plunger
- 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 assembly |
⚠️ This is the old style K Frame cylinder stop assembly. Interchangeable across centerfire and rimfire K Frame models — not caliber-specific. Also see part 1081C for the cylinder stop & spring only (without plunger). Verify your revolver uses the old-style configuration before ordering.
Installation Note
Cylinder stop assembly replacement requires side plate removal and timing verification. Professional gunsmith installation is strongly recommended. Always verify cylinder lockup and timing after installation before returning the firearm to service.