I saw those and thought of them for my son's toy storage, but they were a bit flimsy for the weight of ammo I thought. The display assembly was rather 'floppy' probably due to the Costco staffer that assembled it without tightening up the screws. I was in last night and a poorly-assembled outdoor storage shed nearly tore off its roof hinge when I opened it as most of the hinge screws missed the mark
A really sturdy ammo storage option are the Knaack (or similar) tool storage chests & cabinets.