>>9449613Ebay or most army surplus stores work, but make sure it says that it's workable a lot of stores either purposely leave it out or leave it out not knowing for sure. That's another thing a lot of gas masks and filters are expired, decommed, or for props because of all the movies with gas masks created first a low supply high demand and then later on when the supply got high obscured it with real ones and now people buy and sell fake ones or decommissioned ones. Or hell even ones that would work if it were against tear gas but not serious CBRN. Do your research, there's a wiki for this and don't penny pinch, even the Israeli one's are only good if within expiration dates. But yes there are