I was hoping some one here in the know might be able to help. A buddy of mine, a SAW gunner currently deployed overseas, is interested in acquiring "magazines, collapsable" that contains a 200 round belt of 5.56 rounds? I've seen photos of them: they're the same size as the hard box magazines, but they're made from soft nylon. They have a zipper enclosure, so they are reusable. Can anyone direct me to a site where this item might be purchased? Thank you.