HAPPY NEW YEAR!    10% OFF WITH CODE: 2026

Days
Hours
Min.
Sec.
Days
Hours
Min.
Sec.

10% OFF SITEWIDE! Code: 2026

Free Shipping on orders over $199!

21

Free Shipping from 199$
Shipping Policy

Free shipping on orders over $199!

21

MCK GEN 3 Conversion Kit for GLOCK 20 / 21 – NAKED

CAA USA MCK GEN 3 Conversion Kit for GLOCK 20 / 21 in Gens 3-5. Available in a wide variety of colors.

With the Gen 3, shooters can aim directly using their zeroed RMR, removing the need for an additional optic. It also includes a built-in handgun cleaning solution with a brush / bristle system that cleans the slide during cycling, preventing carbon buildup without harming the pistol’s finish.

The new ambidextrous stabilizer/stock allows for folding to both the right and left sides, an upgrade from the previous right-side-only folding option.

This product has been discontinued by the manufacturer. However, we’re happy to offer a great alternative that is the best match for your needs – 

Check out the Recover Tactical 20/21 Conversion Kit

 

SKU:

MCK21.GEN3

$324.00

Purchase this product and earn reward points ⭐

Add accessories and Save

Add any of these attachments and get 5% off!

MCK Flashlight for MCK Conversion Kits
MCK Flashlight for MCK Conversion Kits
SKU: MCKFL
$63.99 $60.79
Push Button Sling Swivel - MCK PBSS
Push Button Sling Swivel - MCK PBSS
SKU: MCKPBSS
$19.95 $18.95
MCK Micro Red Dot - MRD (Includes Riser)
MCK Micro Red Dot - MRD (Includes Riser)
SKU: MRD
$149.95 $142.45
Thumb Rests for MCK Conversion Kits
Thumb Rests for MCK Conversion Kits
SKU: MCK.THR
$19.95 $18.95
One Point Sling - MCK OPS
One Point Sling - MCK OPS
SKU: MCKOPS
$32.95 $31.30
Product price: $324.00
Order total:
Out Of Stock - Join Waitlist We will inform you when the product arrives in stock. Please leave your valid email address below.

Description

CAA USA MCK GEN 3 for Glock 20 / 21 gen 3-5 micro conversion kit. Pay attention: this kit is not compatible with Gen 1 or 2 Glock models due to lack of forward Glock universal accessory rail.

The MCK no longer relies on the slide and serration for functionality, allowing you to use aftermarket slides, sights, or optics with your MCK!

 

CAA USA MCK GEN 3 – Features:

  • For the first time, the MCK supports slides with a mounted micro red dot or RMR.
  • Shooters can aim with their zeroed RMR while using the Gen 3, eliminating the need for an additional optic.
  • Features a built-in handgun cleaning solution with a brush/bristle system that cleans the front of the slide during cycling, preventing carbon buildup without affecting the pistol’s finish.
  • Ships with a new ambidextrous stabilizer/stock, allowing for folding to both the right and left sides (previously only folded to the right).
  • The Gen 3 stabilizer/stock offers two height options:
    • Lower position for shooting with an RMR or slide-mounted optic.
    • Upper position for use with iron sights, pop-up sights, or optics mounted on the top Picatinny rail.
  • Includes a new front adapter that shields the MCK’s interior from carbon buildup and can be easily removed and washed for convenient cleaning.
  • Features 4.6-inch aluminum front and rear Picatinny rails to support any optic or sighting preference.
  • The stabilizer includes an external brush for slide cleaning and a holder for the Gen 3 charging handle.
  • Ships with both the new Gen 3 charging handle (designed for handguns with RMR/slide-mounted optics) and a standard polymer Gen 2 handle (for use without a slide-mounted red dot).
  • Retains all Gen 2 features, including an aluminum top rail, spare magazine holder with release button, suppressor compatibility (up to 1.56-inch diameter), and the ability to fire with the stabilizer/stock folded.

 

Compatibility:

Glock 20 | 21 Gens 3-5 (will not fit gens 1 & 2)

 

Available upgrades:

Improve your conversion kit performance with the MCK accessories:

MCK Flashlight for MCK Conversion Kits – an Integral Front Flashlight.

MCK Flip Up Sights – Front & Rear

Push Button Sling Swivel – MCK PBSS

MCK Micro Red Dot – MRD (Includes Riser)

Thumb Rests for MCK Conversion Kits

One Point Sling – MCK OPS

Additional Information

Weight 1.5 kg
Dimensions 12 × 6 × 4 in

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Shipping & Returns

Domestic Shipping – For orders shipping within the USA*
Shipping Option Cost Delivery Time
Free Shipping – Regular Registered Shipping – 
*Please note there is no option of adding Insurance protection to this form of shipping
FREE For orders above 199$
12.95$ For orders below  199$
8-16 Business Days
Priority Shipping  14.95$ for orders Above 199$
17.95$ For orders under 199$
4-12 Business days
Express Shipping (UPS) Cost will depend on the destination of the package (calculated shipping cost can be seen at checkout) 3-6 Business days

* For qualified orders. If an item is not available in our US warehouse it will be shipped from Israel (in this case the delivery times may be slightly longer).

International Shipping – For orders shipping outside USA
Free Shipping – Regular Registered Shipping –
*Please note there is no option of adding Insurance protection to this form of shipping
FREE For orders above 199$
12.95$ For orders below  199$
14-35 Business days*
Priority (Eco Post)  14.95$ for orders Above 199$
17.95$ For orders under 199$
8-18 Business days*
Express Shipping  Cost will depend on the destination of the package (calculated shipping cost can be seen at checkout) 3-8 Business days*
*International MCK shipments - Please note that processing, handling, and shipping for international orders may take 10–20 days due to required export procedures.

Returns & Exchanges

All return claims must be made not more than 7 days after the item has been received.
Returns must be sent back within 30 days after delivery.

Exchanges are subject to product availability and may be subject to additional shipping fees.

To be eligible for a return or exchange, the item must be in its original condition, unused, and with all original tags and packaging.

Click here for the full Shipping Policy

Related Preoducts:

You may also like…

Out Of Stock - Join Waitlist We will inform you when the product arrives in stock. Please leave your valid email address below.
Israel Defense Store Logo

IDS Loyalty & Referral Points

Earn points and use them on your next purchase!

Ways to earn

Place an Order

Earn 1 point for every 1$ spent

Refer a Friend

Earn 10 poins for a referral sign-up

& 50 points for their purchase

Birthday Bonus

Earn 150 points on your Birthday!

Update your Birthday

Review Products

Earn 50 points for each product review

Unlock Badges

Earn points for each level reached

Your Points

Check your progress

Apply Points On Cart Total

Conversion: 20 points = 1$


You may return your item within 30 days from the day it was delivered to you in order to receive a refund.
Please notify us of your intent to return the item within 7 days of receiving it.
The item must be in its original condition and packaging.
Shipping costs are non-refundable.
For full return details, click here to view our complete return policy.

Israel Defense Store