Smith & Wesson Model 19 K Frame Hammer Block Used .357 Magnum - 19120B
Smith & Wesson K-Frame Model 19 Hammer Block (Used)
This is a used hammer block (firing-pin safety) from a Smith & Wesson K-Frame Model 19 Combat Magnum revolver. The hammer block is the safety component that keeps the firing pin from moving forward unless the trigger is pulled, so it plays a central role in the revolver's internal safety system. This is a used part, so please inspect the actual photos in this listing carefully before ordering.
Part Details
- Brand: Smith & Wesson
- Part: K-Frame hammer block (firing-pin safety)
- Model: Model 19 Combat Magnum
- Frame: K Frame
- Caliber: .357 Magnum
- Condition: Used
- Listing Reference: 19120B (internal store reference, not a verified factory part number)
Model Compatibility
This hammer block is listed for the Smith & Wesson K-Frame Model 19 Combat Magnum. The chart below lists all Model 19 dash revisions with approximate production years, with known engineering-change boundaries called out. We are not able to verify dash-level differences in the hammer block design from this listing alone, so please confirm fitment against your revolver's serial number or consult a qualified gunsmith before ordering.
| Model | Approximate Production Years | Notes |
|---|---|---|
| 19-0 | 1957–1962 | Original Model 19 |
| 19-1 | 1962 | |
| 19-2 | 1963–1966 | |
| 19-3 | 1967–1968 | |
| 19-4 | 1969–1970 | |
| 19-5 | 1971–1972 | |
| 19-6 | 1973–1977 | Last original-production dash |
| 19-7 | 1997–1998 | 1997 MIM & revised internals |
| 19-8 | 1999 | Final pre-lock design |
| 19-9 | 2017–present | Classic Series reintroduction |
| 19-10 | 2019–present | Classic Series |
Production years are approximate. Dash-level fitment should be confirmed before installation.
Before Installation
This is a used part. The photos in this listing show the exact item you will receive, so please review them closely. Professional gunsmith installation is recommended for any internal safety component, and the hammer block must be correctly fitted and function-checked before the revolver is returned to use. This listing is for the hammer block only and does not include any other internal parts.