hey man, as has been said, dont get new eyes for your ion mate the ones that come with it work, save your money for paint. as for triggers i would go with a New Designs roller blade trigger, they work really well, as for air efficiency if you already have qev, then it may be time to think about a new asa as the one on the ion is not the best around, that and a q lock low rise feed neck. lowers your profile and means you can keep tighter into bunkers.