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Evolution Iv K & L Frame Hammer - Evolution K- & L-Frame Hammer For S&W Revolvers
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$166.25
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SKU: 100018576
Overview
Designed as a replacement hammer for Smith & Wesson K- and L-frame revolvers, this Apex component is intended for shooters who want to convert a compatible revolver to Double Action Only. It uses the same pinned sear and stirrup found on the Performance Center hammer and is supplied fully assembled with the listed sear, spring, stirrup, pins, and rebound slide springs. The hammer has no spur for cocking, so it is suited to a DAO setup rather than traditional single-action use. For owners working within the specified revolver families, it offers a purpose-built parts package for a more specialized trigger configuration.
Why Hunters Choose the Apex Tactical Specialties Inc
Designed As
Semi-drop-in replacement for Performance Center
Uses Same
Pinned sear and stirrup found
Converts Compatible
Revolvers to Double Action Only
Includes Fully
Sear, spring, stirrup, and pins
Supplied Two
Two rebound slide springs for
Key Features
- Designed as a semi-drop-in replacement for Performance Center revolvers.
- Uses the same pinned sear and stirrup found on the Performance Center hammer.
- Replaces MIM components in compatible Smith & Wesson revolvers.
- Converts the revolver to Double Action Only (DAO).
- Lacks a hammer spur for cocking to sing.
- Includes the fully assembled hammer, sear, sear spring, stirrup, pins, and two rebound slide springs.
Best Used For
- For Smith & Wesson K- or L-frame revolver owners seeking a Double Action Only setup
- For users replacing MIM hammer components in compatible non-Performance Center revolvers
- For Performance Center revolver owners built after January 2012 needing a semi-drop-in hammer replacement
- For shooters who want a hammer without a spur for cocking to sing
Specifications
| Compatibility | Smith & Wesson K- & L-Frame revolvers |
|---|---|
| Contents | Evolution IV K- & L-Frame Hammer (fully assembled with the following: Apex fully machined revolver sear, Apex sear spring, stirrup and pins), Rebound slide spring(0.165" silver), Rebound slide spring(0.160" red) |
| Hammer Spur | Absent |
| Intended Use | Converts revolver to Double Action Only (DAO) |
| Manufacturing Method | Wire EDM and CNC machined, then surface ground |
| Material | Heat treated 17-4 Ph stainless steel |
| Mim Components Replacement | Yes |
| Performance Center Compatibility | Originally designed as a semi-drop in replacement for Performance Center revolvers |
| Pinned Sear | Yes |
| Stirrup | Yes |
Pros
- Designed as a semi-drop-in replacement for Performance Center revolvers
- Uses the same pinned sear and stirrup found on the Performance Center hammer
- Converts compatible revolvers to Double Action Only (DAO)
- Includes a fully assembled hammer with sear, spring, stirrup, and pins
- Supplied with two rebound slide springs for installation options
- Lacks a hammer spur for cocking to sing
Considerations & Trade-offs
- Converts the revolver to Double Action Only (DAO), so it is not intended for shooters who want to cock the hammer for single-action use.
- Lacks a hammer spur, which removes a manual cocking option and changes the revolver’s handling compared with standard hammers.
- Designed as a semi-drop-in replacement for specific Smith & Wesson K- and L-frame revolvers, so fitment is limited to the intended platform.
- Includes rebound slide springs in two weights, which gives some tuning flexibility but also means installation may require choosing the spring that matches the desired feel.
Suggested Comparisons
- Revolver trigger and action components
- Smith & Wesson revolver parts
- Double-action-only conversion parts
- Revolver upgrade kits
Suggested Accessories
- Revolver springs
- Revolver trigger components
- Smith & Wesson K- and L-frame parts
- Gunsmithing tools
Frequently Asked Questions
What revolvers is the Evolution IV K & L Frame Hammer intended for?
It is designed as a replacement for Smith & Wesson K- and L-frame revolvers, including Performance Center revolvers and non-Performance Center revolvers made after January 2012, according to the product description.
Does this hammer change the revolver’s action type?
Yes. The listed expected result is that it converts the revolver to Double Action Only (DAO).
Does the hammer include a spur for cocking?
No. The description states that it lacks a hammer spur for cocking.
What comes in the package?
The contents listed are a fully assembled Evolution IV K- & L-Frame Hammer with Apex fully machined revolver sear, Apex sear spring, stirrup, and pins, plus two rebound slide springs: one 0.165" silver and one 0.160" red.
What material and machining details are provided?
The hammer is described as being manufactured from heat treated 17-4 Ph stainless steel, and it is wire EDM and CNC machined then surface ground. No additional material or performance claims are provided.