Last time I saw a “issued” gas mask it was in a pile behind our hooch with all the other abandoned masks in the middle of a desert somewhere. There may have been some side panels in the pile as well.
This is mine from 2004… somehow I ended up with two of them at the end of BCT and they would only take one back, so I kept the better of the two. And somehow, no one else in the company was missing one and all the companies were accounted for