The Gamer Mag Pouch uses MRD technology, allowing the shooter to set their desired retention level without having to worry about the mag falling out. The MRD is a retention device designed to push the mag forward in the mag pouch, setting the retention rather than using the mag pouch or rubber spacers (which can change over time) to pinch the mag pouch in place.
The MRD requires a ⅛” Allen wrench (included) to adjust the retention. The beauty of the MRD is that there is a locking washer in the design to keep the screw from moving once it’s set. This means you can shoot for an entire season and never worry about the retention level of your mag pouch changing.