I hear one of the SCOTT brand masks are the way to go but I honestly have no clue. I would THINK that with the right filter it would do a great job. I'[d rather trust my life to something like that than an old surplus mask.

I still don't know for sure, so don't just buy one without researching.

"Remember that your adversary's desire to live is usually more powerful than whatever ammunition your are carrying in your firearms. Plan accordingly." -tire iron