Glock 20/21 | Micro Conversion Kit (Gen1)

From: $274.00

(173 customer reviews)

Your Glock MCK Selection

Glock 20/21

Optional: $25 OFF MRD | Micro Red Dot (14 Red & Green Settings, Includes Riser) Sights

Improve your accuracy and vision with the Micro Red & Green Dot from CAA and Crimson Trace. Includes Riser.

Optional: 50% OFF Advanced Kit

Front & Rear Flip Up Sights & OPS May Vary Based On Inventory

All of the BEST accessories available for your MCK all in one place! Save a few dollars when you bundle our 500 lumen MCK mounted flashlight/housing, backup flip sights, thumbs rests, sling and sling swivel. Everything to get you to the range and accurate right out of the box!

Optional: Titan 3rd Generation Charging Handle for Glock/P80/PSA Dagger & Gen 1/2/3 MCK's

Works With: Glock 17/19/19X/20/21/22/23/24/25/26/27/28/29/30 31/32/33/34/35/36/37/38/39/40/41/45 + P80 + PSA DAGGER COMPATIBLE WITH GLOCK HANDGUNS GENERATION 1-5

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  • 2 Year Warranty

*Compatible w/ Glock 20 / 21 / 21 SF (models that have Universal Glock Rail)*

*Not compatible with Gen1 & Gen2 models of Glock

*All Accessories Sold Separately

The next generation of Micro Roni is here! We improved our past generation models into the ultimate conversion kit. Micro Roni Generation 4, we call it Micro Conversion Kit, or simply MCK and it’s 100% made in the USA.

This Micro Conversion Kit fits multiple handgun models, into one platform, and helps convert your pistol into the ultimate submachine gun.

It is significantly improved from previous generations of the Micro Roni Stabilizer. Available for select Gen 3, 4, and 5 Glock models.


This Micro Conversion Kit is a lightweight and sturdy platform for Glock handguns. It has a barrel shroud made of aluminum with a polymer body. The extended stabilizer, which now comes standard, enables one-handed firing for better shooting performance. It also comes with a Velcro® strap fastener which provides a custom fit to any user. MCK is the most cost effective conversion kit in the world. Fastest assembly/disassembly conversion kit on the market. Improving accuracy dramatically up to 200 yards. We are the exclusive licensee of the SB tactical stabilizer brace for the handgun conversion kits.

Top Features:

  • No pistol disassembly required – Just place pistol into the kit, lock, and go
  • Allows for multiple handgun models into one platform
  • Top Picatinny rail, allowing a combination of sights and/or optics
  • Side Picatinny rails for mounting additional accessories, i.e… thumb-rests
  • Ambidextrous, fast and easy handling
  • Right-folding stock/arm brace for easy concealment and carry, locks in the folded position
  • Front spare magazine holder for a faster reload
  • Built-in charging handle allowing for quicker assembly/disassembly
  • Exposed slide release for direct contact and easier use
  • Allows for quicker assembly-disassembly
  • Perfect for safe action
  • Fits multiple handgun models
  • Easy concealment and carry
  • Perfect for law enforcement

MCK Measurements:

  • Width: 2.48″
  • Height: 5.70″
  • Length: 13.70″

What is included in the Advanced Upgrade Kit:

  • Polymer-pair side rail thumb rests (MCKTHR)
  • Push button sling swivel (MCKPBSS)
  • One point sling (MCKOPS)
  • Flashlight that fits MCK & Micro Roni 17 / 19 chassis (MCKFL)
  • Polymer front flip-up sight (MCKFBUS),
  • Polymer front rear-up sight (MCKRBUS)

Reviews & Ratings

(173 customer reviews)

173 reviews for Glock 20/21 | Micro Conversion Kit (Gen1)

  1. SJ

    Steve Jordan

    The good: Increases accuracy and easy to install. Ergonomically very comfortable. Fun sporting platform.

    Weaknesses: Folding stabilizer locking mechanism, picatinny rail, and ambidextrous charging handle should be metal instead of plastic. I feel they are the weakest parts of the platform and am not sure how long they will last. Ambidextrous charging handle is also a bit small. The extra mag adapter / holder fits very loosely which doesn’t match the quality feel of the rest of the kit.

  2. AC

    Adrian C.

    Feels sturdy, fits well and makes the G21 much more manageable. Slapped on a green dot from another gun and now it’s something even my girlfriend can handle effectively in a home defense situation.

  3. RF

    Robert Franklin

    Alot of fun! Once zeroed, very accurate at 35-50 yards with no worries. Turned my Glock 21 into a pistol with carbine accuracy.

  4. AW

    Anthony West

    The finish is nice the kit is also nice I haven’t shot it yet

  5. RC

    Raul Clavarino

    It is amasing, I improve my G21 and I love it!!.. It feel strong and it have more accuracy.

  6. VB

    Victor Benson

    Nice cant wait to shoot this beaut down range

  7. MW

    Maurice Watson

    Great fit. Love how the MCK looks. Haven’t got a chance to take it to the range yet but everything is functioning great so I don’t foresee any issues. The accessories are great as well. The thumb rest is a welcomed addition with the size of my hands.

  8. KO

    Kenneth Oliver

    Haven’t been to the range to break it in yet but it functions well and easy instructions to follow. Excited to get out and use it.

  9. CM

    Chris McTeague

    Turned my Glock 21 from not my favorite pistol into a fantastic CQB option. Absolutely worth it.

  10. DK

    Dave K.

    Absolutely love shooting this with my Glock 20. I put a Red dot on it, incredibly accurate. Only one little complaint. I wish the folding stock had a more positive latch in the folded position.

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