probably just unused models. There are a bunch at the weapons merchant in DS9 that aren't actually used too.
"My frozen dairy-based confectionery attracts all the males of the species to the facilities. They all agree on it's superiority. Indeed, it is superior to yours. I could teach you the finer details but that would require monetary recompense on your part." -The Milkshake Song: Vulcan Edition
does anybody know what this is. the lower looks like omega force stuff and some of the upper looks the same. the grenades and shoulder pads in particular but the chest plate or whatever it is looks different.