this pouch can carry a heck of a lot of stuff just on its own. it has two small side pockets, one large inner one and a medium one in front of that, this is all not counting the sipper pouch on the front. There is also velcro on the front for putting a patch if you want.
However, it's strap is not meant for molle, mostly for belts, but I just cut the strap to make it thinner so I could.
I personally use it for dumping my shotgun shells and holding any extra bb cans or speedloaders