The OC Vapor System (OC-V) is a non-flammable formulation affecting one's respiratory system. The OC-V is practically invisible once it becomes airborne and gernally does not require extensive area or personal decontamination. The OC-V is ideal for forcing subjects from small rooms, attics, crawl spaces, prison cells and other confined spaces. It has also been used effectively for crowd dispersal. 

MK-9 Vapor, Model 1947
MK-4 Vapor, Model 1447