Evolution IV Revolver Hammer Kit

Overview

Evolution IV Revolver Hammer Kit by Apex Tactical. Fits Apex Tactical.

Nationwide shipping. Order from anywhere in the US.

The Apex Evolution IV Revolver Hammer Kit is a direct replacement for the factory hammer assembly in your Smith & Wesson revolver. Designed for shooters who demand a consistent, reliable double-action-only (DAO) trigger, this kit replaces the standard MIM (Metal Injection Molded) parts with a pinned sear and stirrup—the same design found on the Performance Center hammer. The result is a smoother, lighter, and more predictable trigger pull that translates directly to tighter shot groups and faster follow-ups, especially under the humid, salt-air conditions of the Florida coast.

For the serious EDC carrier or competition shooter, a heavy factory trigger can be the weak link in your setup. The Evolution IV kit is engineered to reduce that pull weight dramatically. When properly tuned by a qualified gunsmith, you can take a standard factory DAO pull from over 12 pounds down to a competition-ready 4.0 pounds. At that weight, you will want to consider handloading ammunition to maximize consistency. This is not a drop-in guarantee—it requires professional fitting to achieve those numbers—but the mechanical potential is built into every component.

Key benefits for your revolver:

• Corrosion-resistant construction: Built with materials that hold up to Florida’s humidity, salt spray, and daily carry sweat. No rust, no galling, no failures.
• Consistent, repeatable trigger stroke: The pinned sear and stirrup eliminate the slop and stacking common with factory MIM parts. Each trigger press feels the same as the last.
• Permanent DAO conversion: This hammer kit converts your revolver to Double Action Only. No manual safety, no single-action mode—just a smooth, continuous pull every time. Ideal for defensive revolvers where a snag-free profile and consistent trigger discipline matter.
• Improved lock time: Reduced hammer mass and optimized geometry mean the hammer falls faster and straighter, improving ignition reliability with your carry ammo.
• Smooth cycling: The precisely machined surfaces reduce friction throughout the action, making your revolver feel like a custom-built competition piece without losing reliability.

Fitment and specs:

• Compatible with: Smith & Wesson K-frame, L-frame, and N-frame revolvers (.38 Special, .357 Magnum, .44 Special, .44 Magnum, .45 ACP, .45 Colt, etc.). Not intended for J-frame models.
• Replaces: Factory hammer, stirrup, and sear. Uses your existing trigger, rebound slide, and mainspring (though a lighter mainspring may be recommended for full benefit).</