First of all, I'm an airsofter, not a military professional, so my review will be based on airsoft only. The pouch is located on the far left side of my PC.
This pouch is supposed to hold a NVG battery. For the opening system, you got a plastic clip and a velcro, it's wide enough to store several Pistol magazine and can hold 2 M4 mags.
It's my storage pouch of some sorts, I put anything I need on the field inside (BB loader, snacks, water, and yeah cigarettes).
The AOR 1 Fabric is of a excellent quality, I had Flyye AOR 1 pouch before, and I can say that Semapo is more better in terms of durability, the MOLLE straps seems to be better quality as well. Goes really well on 60941.