The Micro Conversion Kit (MCK) from Command Arms Accessories (CAA) was once all the rage. It allows shooters to convert a stock Glock into something that belongs in a sci-fi movie. But why would someone want to turn their trusty Glock into a space-age-looking sub-gun? After all, there are plenty of Pistol Caliber Carbines (PCCs) on the market to choose from.
At its core, the MCK is an accessory, not a firearm. This means that while it changes the form and function of your Glock, it doesn’t alter the gun itself or convert it into an SBR. The MCK comes with a stabilizing brace instead of a stock to keep things legal. A stock would change the gun’s status from pistol to NFA-restricted item.
These braces have been the subject of intense legal scrutiny, but the current situation seems to favor civilians. The stabilizing brace helps with control and accuracy, making it easier to manage recoil and stay on target.
The Gen 2 version of the MCK is compatible with a wider range of Glock models and other popular handguns. When purchasing a kit, you must choose the one that fits your handgun. When ordering mine, I chose the model compatible with a Glock 19. You can easily make some adjustments to make it fit a Glock 17 as well.
When it comes to attaching your Glock 19 to the MCK, it’s a simple matter of inserting your Glock into the bottom of the kit. A locking plate folds up behind it and slides forward. This locks the Glock frame in place while allowing the slide to cycle inside the frame. The kit doesn’t interfere with the functionality of the Glock itself. Inserting or removing the Glock from the MCK only takes a few seconds, which is one feature that makes it pretty cool.
What’s the Purpose of the MCK?
So, why would someone even bother with an MCK when they could just buy a PCC? Well, the appeal of the MCK lies in its versatility and the idea of getting more out of a handgun you already own. That, and some people just like weird-looking guns.
One of the primary benefits of the MCK is its increased stability, which can translate into better accuracy and faster follow-up shots. If you want a little sub-gun for home or vehicle defense but don’t want to purchase another firearm, this isn’t a bad option. They’re not cheap at the regular price, but they can be found on sale from time to time.
If you’ve already invested in a Glock or other compatible handgun, the MCK extends the utility of that investment. Plus, it’s a neat little gadget for those who enjoy the tactical aspect of firearms.
One feature that I particularly like is the MCK’s ability to store an extra magazine. In a high-pressure situation, having an extra mag on hand without having to fish it out of a pocket or pouch is a definite advantage. For my setup, I keep a 27-round Magpul magazine in the MCK/Glock 19, with a standard 15-round Glock mag in the storage area.
This setup gives me 42 rounds of ammo ready to go right from the start. However, you could go even further by placing a 30-round mag in each slot, giving you a total of 60 rounds. All you have to do is drop the empty mag and move the new one from the storage magwell to the Glock magwell. That’s a lot of firepower available at your fingertips.
Does it Work?
Now, let’s talk about performance. How does the MCK with a Glock 19 hold up on the range? While I was a skeptic in the beginning, I’ll admit it’s a cool range toy. It definitely does not feel like you’re shooting a handgun with some weird accessory attached. It shoots as smoothly as a regular sub-gun or PCC weapon.
The added stability provided by the MCK makes a noticeable difference in accuracy. This isn’t surprising since it has a brace and enough room to get a good two-handed grip on it. So far, I’ve fired about 1,200 rounds through the MCK, and it’s held up great.
It might look a bit unconventional, but once you start using it, it really grows on you. A plastic charging handle locks onto the Glock slide when you insert it into the kit. This makes it easy to rack the slide like you would a rifle. At first, I thought this piece would wear down over time and stop catching on the slide, but so far, it hasn’t.
Many shooters choose to outfit their MCK with flip-up sights or a handgun-mounted red dot. In my case, I decided to mount an Aimpoint red dot, and I’ve been more than pleased with the results. The optic is a little big for the MCK, but I wasn’t using it on anything else at the moment, so why not?
It has Picatinny rails on both sides, and the top of the kit, but a special light that fits into the insert just below the barrel can be purchased from CAA. I haven’t gotten around to trying this yet, but I wouldn’t mind checking it out.
Strange Little Sci-Fi Accessory Kit
While it might not be the hottest item on the market anymore, it is still a cool little accessory for your Glock pistol. I use mine for home defense because I can grab it and have an extra mag available if needed.
The arm brace folds to the side so you can shoot it while it’s folded or pull it open to lock it in place. It also has a QD mount under the folding brace attachment so that you can use a single-point sling with it. Would it be a good replacement for a sub-gun? Probably not. But if you already have a Glock pistol and want to maximize your pistol without buying another gun, it’s an awesome accessory.
A black MCK kit would be a little cooler than my Stormtrooper version, but it has still become one of my favorite Glock accessories. Check them out and see what you think.
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