I was pretty excited when I ordered this pouch. I've always been a light player, so no heavy vest with tons of gear, but recently I got this odd compulsion to start working on a MOLLE vest. I already had the vest, couple utility pouches, and a magazine pouch (for four M4 style magazines). I honestly am extremely disappointed with this product. I tried to trust the previous review for this product but I was really let down. I don't think they really touched on the real application of this pouch. Somebody wrote that you can fit eight M4 magazines in this thing, and this is true, BUT... this pouch will fit eight M4 magazines ONLY if you neatly organize them as you put them in. In the real application of this item you will probably be trying to DUMP your magazines in, not neatly place them. This results in a much lower carrying capacity, I would say a realistic number is four, maybe five (M4 magazines).
Another key flaw I had with this pouch was the elastic "lips" that prevent magazines from leaving the holding compartment. I'll start it off by saying this, they do their job... I have never once had a magazine leave the compartment while this piece was attached. But this is also where the flaw comes in... they made it TOO difficult to get the magazines in. It's not impossible, but it takes more effort then it's worth, you really have to wiggle the magazine around in the elastic part in order for it to fully slide through. On top of this, when the elastic is on, if you already have two or three magazines inside the pouch, then they block the entrance to the pouch and prevent the current one from being disposed of. Another heads up is that the "lips" are in no way easy to put on, they require at least a few minutes so they can be snapped onto the top of the pouch, and when the buttons are finally on, they break rather easily (simply put, the actual female end detaches from the fabric -- very irritating and time consuming to fix). you can opt out on the elastic lips, but that leaves you with either a large open-top bag or an over-sized velcro storage pouch.
The only redeeming part of this product is the fact that it is enormous. You can use it for all sorts of large things... Drum/Box Magazines, Multiple Bags of BBs, a large pair of binoculars I suppose, maybe you sweat a lot and want to put a t-shirt inside it... I don't know, the point is that this pouch has a lot of space inside it.
I'll just get down to the pros & cons for you:
Can hold Drum/Box Mags
Elastic is "Over-Effective"
Not Great for Combat Use
Irritating to Use
Overall a poorly tested product