As far as the gas goes, you might want to take a look at one of these. PRI Gas Buster CH Here: http://www.precisionreflex.com/Detail.aspx?PROD=186694 I have one that I've swapped around with different rifles under different conditions, and feel they do what they advertise, and in your case, you'd see even more benefit. A little expensive, but will keep gas, lube, etc out of your face. Just a thought.

FT