I have this just laying around has a cs canister on it. works great my buddy who works at the gas chamber used it for a month when he lost his. has the drinking tube still. I cut the comm. input on it but im sure if u want on u can find one. will trade for b series parts, da parts, or i will take cash(throw offers)

http://www.drillspot.com/products/66...ask_Respirator this is what they retail for