Quantico Tactical showed an updated 40mm grenade pouch called the RE Factor Tactical 40mm Grenade Pouch.

After a detailed assessment by the military (no unit name was given), the producers decided on the shape of the pouch presented in the photos. The models in the pictures are prototypes printed using 3D technology. The final product is to be injection molded using Coyote colored material.
The first of the changes present in the prototype shown is the upper retention rubber that can be removed. PALS compatible mount has also been slightly modified so that it can also be used on straps.

The pouches can be mounted on the panels presented below, which in turn can be combined in greater numbers and mounted, for example, in a vehicle.

Source: soldiersystems.net,refactortactical.com