Choosing a Micro Conversion Kit (MCK) from CAA can feel overwhelming with the different generations available. While all three models enhance your handgunโs performance and usability, each generation introduces meaningful upgrades and features. To help you make the most informed decision, this guide provides a comprehensive comparison of the MCK Gen 1, Gen 2, and Gen 3. Weโll break down the key differences in everything from optics support to internal mechanics, so you can clearly see how each model has evolved and which one is your perfect fit.
GEN 1 | GEN 2 | GEN 3 | |
|---|---|---|---|
| Form Factor | Slim, compact, and the lightest of the three generations. | All Gen 1 features, with improved ergonomics and handling. | All Gen 2 features, with enhanced modularity and usability. |
| Handgun Optics | NOT COMPATIBLE with slide-mounted optics. | NOT COMPATIBLE with slide-mounted optics. | Fully compatible with slide-mounted optics (RMR). |
| Charging Handle | Standard design. | Improved grip and contact area. | Dual, ambidextrous system that is not dependent on slide serrations. |
| Top Rail | Standard polymer rail. | Upgraded to a durable aluminum rail. | Front and rear 4.6-inch aluminum Picatinny rails for versatile optic mounting. |
| Rear Door | Standard rear door. | Extends back an extra 15 degrees for easier insertion/extraction. | Redesigned for compatibility with a wider range of handguns. |
| Suppressor | Does NOT support suppressors. | Supports suppressors up to 1.38 inches in diameter. | Supports suppressors up to 1.56 inches in diameter. |
| Suppressor-Height Sights | Does NOT support suppressor-height sights. | Compatible with suppressor-height sights. | Compatible with suppressor-height sights. |
| Stabilizer | Right-folding only. | Allows user to fire with the stabilizer in the folded position. | Folds to the left or right side, with two height options. |
| Internal Features | Basic. | Improved spare magazine holder with a dedicated mag catch and release button. | New “CAR-WASH” cleaning system with internal brushes; easy-to-remove front adapter for cleaning. |
| Handgun Compatibility | Compatible with most Gen 3 and up Glock models. | All Gen 1 compatibility, plus suppressor-height sights. | All Gen 2 compatibility, with broader support for pistols with slide-mounted optics. |
Still Not Sure Which MCK is Right for You?
MCK Gen 1: Built for the Basics
This model is excellent if you want a simple, lightweight platform that gets the job done. It’s best suited for those who use standard iron sights and don’t plan on adding a suppressor or slide-mounted optics. It keeps things clean and straightforward — nothing extra, just solid performance.
MCK Gen 2: The Practical Upgrade
This model is for the user who wants more than the basics but isnโt looking for every advanced feature. It builds on the solid foundation of the Gen 1 with practical, meaningful upgrades. This is the ideal generation if youโre running suppressor-height sights or a suppressor up to 1.38″ in diameter. The improved ergonomics, easier handgun insertion, and the ability to fire with the stabilizer folded make it a noticeable step up in usability.
MCK Gen 3: The All-In-One Powerhouse
If you want the most capable and fully featured MCK available, Gen 3 is the one for you. Itโs built for shooters who run slide-mounted optics and want to use their red dot without compromise, with full RMR compatibility right out of the box. This generation also includes an ambidextrous stabilizer, larger suppressor clearance, and built-in cleaning port for easier maintenance. If you need maximum compatibility, top-tier performance, and a setup that adapts to whatever you throw at it, Gen 3 is the clear choice.
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