$166.25
7 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
The Apex Evolution IV Hammer Kit is one of those upgrades that quietly transforms how a Smith & Wesson revolver feels in the hand. It converts a K-Frame or L-Frame to double action only by removing the hammer spur entirely, which knocks out a common snag point and gives you a cleaner, more repeatable pull. The whole thing started life as a semi-drop-in replacement for Performance Center guns, and Apex carried that same pinned sear and stirrup design over to this kit so you get Performance Center-level internals in a package built for everyday production revolvers.
Apex builds this hammer from heat-treated 17-4 PH stainless steel, then runs it through wire EDM and CNC machining before surface grinding it for consistency. That matters because it replaces the metal injection molded (MIM) parts found in standard S&W revolvers and even Performance Center guns built after January 2012. Swapping those cast components for fully machined stainless steel is where a lot of the smoother, more predictable trigger feel comes from.
This is a favorite among double-action revolver folks, whether they're running a wheelgun in competition or setting up a dedicated carry piece. Paired with a factory trigger it makes for a slick everyday setup, and dropped in alongside a competition DAO trigger it turns into a serious match gun. If you like the deliberate, no-single-action simplicity of a DAO revolver, this is the kind of part that earns its keep.
The kit fits current production S&W K-Frame and L-Frame centerfire revolvers with a frame-mounted firing pin, and it is not made for rimfire models. Apex recommends installation by a qualified gunsmith, and while some fitting may be needed, plenty of hands-on folks tackle it at the bench.
It converts your Smith & Wesson K-Frame or L-Frame to double action only by using a spurless hammer, so there's no single-action cocking. Because it swaps the factory MIM parts for fully machined 17-4 stainless steel components, most folks notice a smoother and more consistent trigger pull. It's a popular setup for both carry guns and DAO competition revolvers.
This kit is made for current production Smith & Wesson K-Frame and L-Frame centerfire revolvers that use a frame-mounted firing pin. It is not built for rimfire models. If you're running an N-Frame instead, Apex offers a separate kit (108-002) for that platform.
Apex recommends having a qualified gunsmith handle the installation, and some fitting may be required to get everything dialed in. It was originally designed as a semi-drop-in part, so mechanically inclined folks with revolver experience do tackle it at home. If you're not comfortable working inside a revolver, a gunsmith is the safe bet.
The Evolution IV uses the same pinned sear and stirrup design found on Performance Center hammers, machined from heat-treated 17-4 PH stainless steel rather than cast MIM. That machined construction is where the more predictable, repeatable trigger behavior comes from. It's a meaningful upgrade for anyone chasing consistency out of a double-action wheelgun.
| UPC | 856008005406 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 108-001 |
| Model |
You must be logged in to post a review.
Reviews
There are no reviews yet.