TFB First Look: MCK, a Micro Roni Stabilizer Update

Tom R
by Tom R

I first had the pleasure of getting hands on with the Micro Roni during an event at the end of 2016. The event was focused on the Micro Roni, the MH1 Reflex Sight, and a training course (“IDF Train the Trainer”), and was run by Mikey Hartman, CEO of CAA (and a retired Lt Col of the IDF). Since then he has remained in touch and not just about firearms related stuff–he is an all around genuine good friend.

I found out this morning about some interesting changes to the Micro Roni (with Stabilizer), which originally received an insane amount of social media love, getting somewhere north of 60 million views across their channels. I reached out to Mikey to see if I could find out some more information and he sent us some pictures and drawings while taking a few moments to fill me in on the changes.

After attending the class in 2016, I actually purchased a Micro Roni with my own hard earned cash–I was a big enough fan. That said, there were some trade offs with that version, mainly to fall within BAFTE compliance, and because of some manufacturing choices.

The new update not only resolves those issues but it also comes with a few other benefits–an actual drop in price and complete manufacture in the US (opposed to Israel). It is also rebranding to be called the MCK (Micro Conversion Kit).

Mikey Hartman had this to say:

We tried to improve the conversion kit in multiple ways that will make it much more fun and accurate to shoot while be much more inexpensive than our previous versions of the micro roni .

New Features

The MCK will allow for multiple Glock models to fit in the one chassis. Previously there were model specific ones. There will also be versions for the Sig p320 and S&W M&P.

CAD Rendering. The forward ledge on the front grip allows for a pinch between the index and middle finger. I'm interested to see how this works and feels.
  • MCK – fits the 17, 18, 19, 19x, 22, 23, 31, 32, and yes, even the new 45 (it is limited to Glocks Gen 3-5 though)
  • MCK 21 – fits the Glock 20,21
  • MCK S&W – fits the M&P 2.0 and 2.0 compact
  • MCK Sig – fits the p320 in 2 sizes

All of the above versions will be out this year in the “Non NFA” version. As an added benefit, they will all come with the extended stabilizer (which used to be an $75 add on). Other new features include a spare magazine holder, a better engineered platform for index and middle finger on the forward angled grip, an exposed slide release (rather than the problematic one from the original), a fully captured charging handle (the earlier models this was a separate piece and added some challenges for installation of the pistol).

Looks like this will accomodate the belt "holstering" device as well.

All of this will come in at a price point of $249, which is a full $100 cheaper than the previous version. In part this has to do with advantages to producing here in the US. Dealers will also benefit with much better margins allowing for much better distribution. Initial release of the MCK for pre-orderss will be November 1st (on the CAA website) with the other variations to follow. There will also be upgrade kits that include BUIS, lights and slings (similar to the existing lines).

Below are some pics of the 3D Printed prototype:

Note the large opening for the slide release. This alone is a huge improvement.
Looks like a larger ejection port
Top still integrates the rail so you can mount your optics of choice.
Bottom view. Very thin profile.
The barrel depth is adjustable to accomodate the 19 vs 17 length pistols.

We plan to get our hands on one as soon as possible so we can do a more comprehensive hands on test with the new version. Let us (and them) know what you think in the comments! You can learn more about CAA on their website:

Tom R
Tom R

Tom is a former Navy Corpsman that spent some time bumbling around the deserts of Iraq with a Marine Recon unit, kicking in tent flaps and harassing sheep. Prior to that he was a paramedic somewhere in DFW, also doing some Executive Protection work between shifts. Now that those exciting days are behind him, he teaches wilderness medicine and runs an on-demand medical staffing business. He hopes that his posts will help you find solid gear that will survive whatever you can throw at it--he is known (in certain circles) for his curse...ahem, find the breaking point of anything.You can reach him at tom.r AT or at

More by Tom R

Join the conversation
9 of 17 comments
  • Cymond Cymond on Oct 06, 2018

    Really wishing I had a 17 instead of a 34 right now …

    • See 6 previous
    • Cymond Cymond on Oct 15, 2018

      @javadog Damn.

      "Thank you for your question regarding the MCK. The big difference is that this charging handle is locked into the frame and is non-removable, where as the previous models the charging handle would come out of the chassis and you would put it on the Glock then insert the Glock and charging handle back into the frame. The new charging handle still only works with existing factory glock slide because it grabs onto the charging grooves on the back of the slide…I have not tried it with a custom slide so I do not know if it will work.

      I added the emphasis. I think LWD offers slides with grooves that match the factory Glock grooves. I guess the best option is a factory 40 S&W slide with a 9mm conversion barrel. (I want to run a suppressor, so I'll need an aftermarket barrel anyway.)

  • BryanS BryanS on Oct 06, 2018

    Do want.