Commands Arms Accessories
- 2008
- 2018 Micro Conversion Kit (MCK)
– Micro Roni - 2020
– GLOCK 26/27, Springfield XD, XDM, XD MOD2, and XDM ELITE in 9mm/.40 S&W and .45 ACP/10mm, as well as the GLOCK 43, 43X and 48, and a Gen 2 MCK for the Glock 20/21
About CAA (Command Arms Accessories)
CAA, short for Command Arms Accessories, is a firearm accessory company with deep Israeli roots, led by CEO Mikey Hartman, a retired lieutenant colonel of the Israel Defense Forces. CAA is best known for pistol conversion chassis that turn a standard handgun into a compact carbine-style platform with a forward grip, rail space and a stabilizer. Its Micro RONI for Glock pistols drew enormous attention online, with promotional videos reported at more than 60 million views, and made the “pistol in a chassis” concept familiar to American shooters.
In 2018 CAA rebranded and updated the Micro RONI as the MCK, or Micro Conversion Kit, and moved manufacturing from Israel to the United States. A single MCK chassis fits a range of Gen 3 to Gen 5 Glock models, with versions for the Glock 20/21, the Smith & Wesson M&P 2.0 and the SIG P320, plus a non-NFA configuration. For gun owners, the MCK sits at the intersection of practical home defense and federal rules on braces and short-barreled rifles; ATF’s 2023 pistol brace rule was vacated by a federal court in June 2024.
Key Facts
- May 2016: The Micro RONI is unveiled as the third generation of CAA’s RONI pistol-carbine kits, offered for the US market with a folding stabilizing brace.
- October 5, 2018: CAA introduces the MCK as an updated Micro RONI with an included extended stabilizer and US manufacture.
- November 1, 2018: MCK pre-orders open at $249, about $100 less than the previous version.
- June 2024: A federal court in Texas vacates ATF’s pistol brace rule in Mock v. Garland.
Learn More
Sources
- TFB First Look: MCK, a Micro Roni Stabilizer Update (The Firearm Blog, 2018)
- CAA Micro-RONI pistol-carbine conversion chassis (all4shooters)
- An Update on Legal Challenges to the Pistol Brace Rule (Duke Center for Firearms Law, 2025)
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