MCK | Mx3 Master Marksman Sleeve
(2 customer reviews)

MCK | Mx3 Master Marksman Sleeve

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The benefits of the MX3 Sleeve with CBT™ Technology: 

  • Increases focus and speed
  • Improved sense of clarity and calm
  • Heightens decision making


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Frequently Bought Together


Mx3 Master Marksman Sleeve

With CBT by eSmartr CAA USA, the makers of the World-Famous Micro Conversion Kit (MCK), is proud to partner with eSmartr® to introduce the cutting edge eSmartr® Sleeve with Cognitive Boost Technology (CBT) to the shooting sports industry. We call it the MCK Master Marksman Sleeve, or MX3 Sleeve for short.

The proprietary Cognitive Boost Technology ™ (CBT) pattern embedded inside every Sleeve activates receptors in the skin that trigger a neural response in the brain- resulting in scientifically proven to enhance focus, calm, and concentration.


The MX3 Sleeve with CBT™ technology is non-invasive, drug-free and imprinted with the CAA USA logo on the inside of the sleeve and the World Famous MCK logo on the outer side. The sleeve comes in sizes Small, Medium, Large and X-Large. Simply wear the MX3 Sleeve for 20 mins before shooting and then watch your results improve. You have to try it to believe it!



Weight 1 lbs
Dimensions 8.5 × 12 × 2 in

Small, Medium, Large, Extra Large, Extra Extra Large

Sizing Guide

MCK Sleeve

2 reviews for MCK | Mx3 Master Marksman Sleeve

Based on 2 reviews
5 star
4 star
3 star
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1 star
  1. Mark J.

    Wife noticed a decrease in my annoyance factor. Works great!

  2. Daniel Robbins

    I’m a skeptic so I don’t know about all the claims, and if the tech actually does anything. That being said it looks really cool and feels nice, and I feel cooler shooting with it, so that’s definitely worth the price.

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