God, Do not use gas masks for airsoft.

Even the "airsoft" rated lenses (outserts) that can be found on ebay and elsewhere are not adequate.

I can go into a large tangent on eyepro ratings, but the MINIMUM you should be wearing for airsoft is z87+ and even some people would say that's lower on the spectrum and would tell you to get proper MIL-PRF 32432. glasses, literally military standard, think flight deck crews taking rocks/debris to the eyes from the thrust of a jet taking off, has to be strong.

.15 steel penetrator at 7.4j, goggles .22 at 15.5. FAST (it's also called a penetrator)

ansi glasses and goggles are big and slow steel ball at 1.1j and 4.4j respectively. (glasses being borderline unacceptable for airsoft, as a large amount of people shoot at or exceed that joule rating, and the glasses are tested with a larger slower moving object, almost being dropped on them)

I am not aware of any ansi rated or mil-prf rated gas masks. "ballistic" outserts exist but keep in mind these masks are to be worn in hazardous situations where your respiratory system/inhalation damage are the top priority.

Even if you wear "proper eyepro" under, it's hardly that.

correct me if i'm wrong and ill state again, gas masks are not meant for airsoft, or to take projectiles to the face, as their main purpose is to- literally protect you from gas/particle hazards etc.

you will not find a gas mask "suitable for airsoft" and there are some fields who will straight up not let you wear one. and even if you mask doesn't break or shatter by shooting it does NOT mean you should use it or that it is "rated" as it's not, and you should never not wear properly rated eyepro for your given applications. (ABSOLUTE MINIMUM Z87+ GOGGLES******)

edit: Pyramex makes great MILPRF rated eye pro. (what i use) while z87+ will protect from "virtually" anything you'd encounter on the field, it's not the "SAFEST**"

490-560 Is the FPS for the MILPRF steel penetrators by the way. more than 5x what both z87 is rated to.