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Review: CAA MCK

I had really high hopes for the CAA MCK. CAA brought production to the USA. They lowered the price versus previous versions of the Roni while also adding meaningful features. The concept is interesting and still has potential… but does the MCK live up to its potential? Let’s find out.

What’s an MCK?

The MCK is the latest interation of CAA’s Roni concept. The MCK is not a firearm, it is an accessory for your handgun. It is basically a chassis in which you place a handgun to allow for use with a brace or shoulder stock (NFA) along with the ability to mount lights, optics, and other accessories. The process of locking your handgun into the MCK takes only moments.

The combination of a mounted optic and the additional stabilization opens up some interesting capabilities for your EDC handgun. It stretches the distance at which you can comfortably get hits with a handgun. It stabilizes the handgun to the point that follow up shots are much faster. On top of all that, it isn’t a firearm so you can leave it in your vehicle or backpack with less worry that it will be stolen.

Unfortunately, I won’t be taking that deep of a dive into the rest of the MCK features because I am not shooting mine until I can get some issues addressed.

Observations from Use

I purchased my MCK right at the end of 2018 to take advantage of CAA’s introductory pricing. I suppose that makes me an early adopter which is always a little risky.

My problems with the MCK started on the very first day, before I was even able to shoot it. The button that locks the stock in the closed (unfolded) position popped out of the stock after just locking and unlocking it a few times. It started out intermittent but became gradually worse to the point that it will not stay in at all by the next day.

I contacted CAA with this issue the next day and was told on the phone that “it’s a brand new product” which I am not sure makes it okay but I understand. I was also told that I should remove one of the coil springs behind the button and try bending the locking tabs on the button outward to improve the engagement between it and the stock. This didn’t work because the button is made from injection molded plastic which will not hold a bend.

I contacted CAA again to let them know that removing the spring and attempting to bend the plastic tab didn’t work. I was told that I would be sent a new button.

The fit between the brace body and the button is very poor on my example. I am not sure if that is because the button is undersized or if the channel that it rides in is oversized. Either way, I hoped a new button would fix my issues… but the new button never arrived.

I waited for than a month (January 8th to February 18th) before contacting CAA again. The person I have been communicating with stated that they would contact customer service and get back to me. It has been nearly a month and I don’t have a response or a button. I am not even sure if the button will fix the issue.

Now, I am starting to find that the Gen 3 Glock 19 that I was using with my MCK can become at least partially unlocked from the MCK while shooting. The G19 can’t move much because it is locked into the chassis from behind as well. However, the light rail is unlocking from the MCK’s internal spring loaded bar. I don’t really want to continue shooting it until that is sorted out but I have no confidence that it ever will be based on the last few months.

Wrap Up

At this point, I don’t really have any resolution and I may have a $200+ paperweight. I would like to see this work because I think the concept is really interesting and from the little shooting I was able to do with it, the performance is there. Hopefully, CAA can make this right.

UPDATE: I was contacted almost immediately after posting this review by LTC (Ret) Mike Hartman, CEO of CAA in the US. He was a pleasure to talk to, answered my questions, and is taking steps to make this right.

There have been some product improvements that address the brace button issue and he assures me that this was only an issue on the initial pre-order batch. The fact that I never received the improved replacement button was a mistake for which he took ownership. He also assured me that the unlocking spring bar is not an issue because it is the rear locking gate that keeps the Glock in place which I absolutely believe and that the spring bar is unnecessary to the integrity of the lockup.

You can read more about the CAA MCK at CAAGearUp.com.

CAA MCK – Micro Conversion Kit – More Features, Made in the USA, Lower Price

CAA has improved their RONI product line with the introduction of the new Micro Conversion Kit or MCK. The MCK boasts several improvements over the previous RONI Micro, not the least of which is that it is now made in the USA and costs $100 less!

Additionally, pistol versions now come standard with a longer stabilizer brace that is easier to use. It also has an aluminum barrel shroud as compared to the plastic shroud on previous versions. The new MCK allows access to the slide release and the chassis retains the charging handle making the conversion easier to install and uninstall. It also incorporates a spare magazine holder among other improvements.

These are available to order for several handguns including a model for the Glock G17, G19, G19X, G22, G23, G31, G32, and G45 along with models for the Sig P320, Glock 21, and S&W M&P 2.0. CAA states that most models will ship before Christmas.

To summarize… CAA has taken an already well-liked product and started making it in the USA, reinforced key areas with metal, improve the brace, added other features… and they are charging less for it. That sounds like a winning strategy.

Check out the new Micro Conversion Kit at CAAGearUp.com.

The First Non-NFA CAA RONI Stabilizer Now Shipping to Distributors and Dealers

Brace all the things!


From CAA:

Pompano Beach, Fla. (May 2016) – CAA, developers and manufacturers of advanced battle-tested firearms accessories, announce the long awaited release of the NON-NFA RONI®. It features an officially licensed SB Tactical™ Pistol Stabilizing Brace™, and is now shipping to distributors and dealers. The Pistol Stabilizing Brace enhances one-handed firing of the RONI-STAB by attaching to the operator’s forearm.  The RONI-STAB is the first NON-NFA RONI available, meaning less paperwork, no wait and no additional costs.

The Pistol Stabilizing Brace has an adjustable and flexible nylon strap for a custom fit for any user. Although originally designed for wounded combat veterans and others with disabilities that inhibit their ability to securely hold a firearm, the overwhelming acceptance of the Brace within the firearms community has propelled the product to be one of the most sought after PDW pistol accessories on the market. The RONI-STAB is constructed from high quality elasto-polymers to exacting tolerances. It has been designed to fit multiple handgun models. The RONI-STAB for the GLOCK® 17/19 is available now.  The RONI-STAB also has models for Beretta, H&K, SIG SAUER, Springfield😄, and many other brands.

The RONI® platform requires no pistol disassembly at all. Simply drop the pistol in the kit and it locks within seconds.  Many of the features on RONI® are ambidextrous, including the trigger-guard safety, and a super-fast charging handle.   Other features include Picatinny rails for two sighting devices and additional side rails.

The RONI® Stabilizer is available in Black or Tan.  Visit your local dealer and see for yourself!

*The RONI® Pistol Stabilizing Brace™ is intended only to be used as designed as a forearm brace. The addition of a stock and/or forward grip to the RONI-STAB would convert it into a NFA controlled Short Barrel Rifle (SBR) and Any Other Weapon (AOW).

RONI® RECON Stabilizer Specifications:


Fits: GLOCK® 17/19, Beretta, H&K, SIG SAUER, Springfield XD, Armscore/Rock Island, Jericho®, Bersa Thunder, BUL Cherokee   and other GLOCK® models

Weight: 49.4 oz.

Height Max: 6.3”

Length:  22”

Width:  2.5”

Material: Poly/Aluminum

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About CAA:

CAA USA is the exclusive distributor of world-class, operator-tested firearms accessories and the Hartman MH1 Reflex Sights. Our products are specifically designed to meet the rigorous demands of tactical solutions required by the world’s armed forces, law enforcement units and weapons professionals. CAA product line includes advanced flash lights, bipods, handgrips, Picatinny rail systems, tubes, butt stocks, cheek rests and the patented RONI® pistol-carbine conversion. www.CAAGEARUP.com

About SB Tactical™:

SB Tactical™, the originator of the Pistol Stabilizing Brace™ and manufacturers of industry-leading firearms accessories, is setting the bar for innovation and product development in the PDW Pistol category. The SB Tactical line of products is veteran designed, BATFE approved, and manufactured in the U.S.A. For more information on the brand’s growing line of products for multiple firearms platforms, visit http://www.sb-tactical.com.

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