Tiny when folded but boasting a nice capacity when unfolded. I mount this to my belt and chose it over a regular belt-mounted dump pouch mostly because of the price. The pouch is very stiff at first, which is a good thing because I like to leave it open for easy magazine dumping.
The description is right, it does fit six M16 magazines while retaining the ability to close. If you have some time on your hands to rearrange magazines, you can fit eight in there, but you won't be able to close it. Really, though, if you have that time, you should empty this out and put your spent mags back into your pouches, feeding end up (to distinguish from full mags).
Solid attachment straps (good for belt or MOLLE)
Stiff (doesn't collapse closed)
Folds up nicely, if that's what you want to do with it
None that I can think of
Rating: [5 of 5 Stars!]