MCK | Mx3 Master Marksman Sleeve
(20 customer reviews)

MCK | Mx3 Master Marksman Sleeve


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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

20 reviews for MCK | Mx3 Master Marksman Sleeve

Based on 20 reviews
5 star
4 star
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1 star
  1. This was just a forced buy so yeah. My family is gun nuts and four are going to buy MCK after holidays so maybe I’ll regift it to one of them.

  2. As mentioned great product

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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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