CAA MCK Gen 3 Micro Conversion Kit for Glock 20 & 21
Shop all CAA$31400
Pistol: Glock 20/21
Color: Black
| Brand | CAA |
|---|---|
| Department | Shooting |
| Item model number | MCK21GEN3 |
| Shipping weight | 5.0 pounds |
About this item
- Fits: Glock 20 & 21
- Picatinny rail space for lights, lasers, sights and grips
- Charging handle to rack the slide from the chassis
- No permanent changes to your pistol
- Designed and made in the USA by CAA, 1-year warranty with registration
Product description
The CAA MCK Gen 3 conversion kit for the Glock 20 and 21 brings CAA's newest generation to Glock's large-frame 10mm and .45 ACP pistols. If your big-bore Glock wears a micro red dot on the slide, this generation keeps it in play. Gen 3 was the first MCK able to accept an optic-equipped slide, so you aim through that zeroed dot inside the chassis.
CAA shaped Gen 3 around feedback from MCK owners, and several of the changes deal with upkeep. Bristles built into the kit scrub the slide's front end each time it cycles, and CAA states the brushing leaves your finish alone. A removable front adapter guards the interior against carbon, then rinses clean after a range day.
Sighting stays flexible on 4.6-inch aluminum front and rear top rails. You also get two charging handles: one with a backplate for optic-equipped slides and a standard polymer handle for slides with no dot. The spare mag holder and its release button carry over from Gen 2, and suppressor capacity grows to a 1.56-inch diameter.
Pick from FDE Tan, Black, Tungsten Grey or OD Green. Like the rest of the MCK family, it is made in the USA, and no FFL is needed to buy it. Some states limit these kits, and we don't ship to those states, so confirm yours before checkout.
CAA MCK lineup compared
| Kit | Fits | From | Colors |
|---|---|---|---|
| MCK Gen 1 | Model-specific: Sig P320, S&W Shield and M&P, Springfield Hellcat and XD | From $242.00 | 4 |
| MCK Gen 2 | Model-specific: Glock, Sig P365, Taurus, Canik, CZ, Polymer80, PSA, Ruger, S&W M&P | From $270.00 | 4 |
| MCK Gen 3(this kit) | Model-specific: Glock 17/19 family, Glock 20/21, Ruger RXM (newest generation) | From $314.00 | 4 |
| MCK EVO | One chassis for 100+ handgun models | From $296.99 | 5 |
Questions and answers
Will my slide-mounted red dot work with this Gen 3 kit?
Yes, if it is a micro red dot or RMR. CAA built Gen 3 to accept slides carrying those optics, and the Gen 3 charging handle has a backplate made for them.
How do I clean the inside of the chassis?
Remove the front adapter, rinse it and put it back. It shields the inside of the MCK from carbon buildup.
Can I still run iron sights or a rail-mounted optic?
Yes, the 4.6-inch aluminum front and rear top rails take any optic or sighting setup, and the standard polymer charging handle covers slides without a dot.
Which pistols does this listing cover?
The Glock 20 and Glock 21 only. If you're unsure about your specific pistol, email rod@ossamerica.com with the exact model before you order.
Learn more
Product information
| Brand | CAA |
|---|---|
| Department | Shooting |
| Item model number | MCK21GEN3 |
| Shipping weight | 5.0 pounds |
| Package dimensions | 17 x 8 x 7 inches |
| UPC | 814716056943 |
