Smith & Wesson J Frame Model 30 Cylinder Stop & Spring Old Style - Used
$12.99
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Smith & Wesson J Frame Model 30 Cylinder Stop & Spring Old Style - Used
$12.99
This listing is for a used Smith & Wesson J Frame Model 30 cylinder stop and spring — Old Style. Factory OEM parts sold as-is.
The cylinder stop (also called the bolt) is the part that locks the cylinder in alignment with the barrel at the moment of firing, ensuring each chamber indexes precisely with the forcing cone. The cylinder stop spring provides the tension that drives the stop into the cylinder notches. This is the Old Style version (part JB3009A), correct for earlier production Model 30 revolvers chambered in .32 S&W Long. A key action component for gunsmiths performing timing work or restoration on vintage Hand Ejector revolvers.
Part Details
- Part Number: JB3009A
- Condition: Used
- Parts Included: Cylinder Stop (Bolt) & Cylinder Stop Spring
- Style: Old Style
- Fits: Smith & Wesson J Frame Model 30 (earlier production)
- Caliber: .32 S&W Long
- Frame: J Frame
- OEM: Smith & Wesson Factory Part
Old Style vs. New Style
| Part Number | Style | Fits |
|---|---|---|
| JB3009A | Old Style | Earlier production Model 30 |
| JB3009 | New Style | Later production Model 30 |
If you are unsure which style your revolver requires, contact us with your serial number and we can help identify the correct part.
Model Compatibility
| Model | Frame | Caliber | Compatible |
|---|---|---|---|
| Model 30 (early production) | J Frame | .32 S&W Long | ✅ Yes — Old Style |
| Model 30-1 | J Frame | .32 S&W Long | ⚠️ Verify — may require New Style |
| Model 31 | J Frame | .32 S&W Long | ⚠️ Verify fitment |
| Model 32 (Pre-Model) | J Frame | .32 S&W Long | ⚠️ Verify fitment |
| Model 36 / 60 / 37 | J Frame | .38 Special | ❌ No — different caliber/generation |
Note: The Model 30 is chambered in .32 S&W Long, distinct from .38 Special. Cylinder stop fitment and timing can vary between production eras and dash numbers. Always confirm your model and dash number before ordering. To find your model number, swing out the cylinder and check behind the yoke on the frame. Models without a number predate 1957–58 — contact us with your serial number for assistance.
Installation
Cylinder stop installation and timing verification requires a qualified gunsmith. Improper fitment can result in cylinder misalignment and unsafe conditions. Factory replacement parts are manufactured to the same specifications, tolerances, and materials as the originals.
Questions? Shoot us an email or give us a call — we're here for all your S&W needs.