I've got the Longshot, and one of my "when I get around to it" projects - mostly because it'll be easy as heck - is to grind off the Nerf logos and paint the whole thing flat black. Can't decide on what to do the highlights in - might go OD like the mod pack Vazan posted.

Actually, now that I think about it, I could do a "worn" look and do an undercoat of grey or silver, and buff the black off in some spots for that "lived in" look.

Hmm...