Here is what I did to one of mine......Fairly new here and I wanted to know just what you intended to use the rifle for? I too am looking into modifying my M1A bush rifle when I get back from Iraq. I already have the mount from Smith Enterprise and will be getting low mount rings from SEI too. As for an optic a leupold but not sure which one yet. A setup like that should really be all you need. If you plan on sitting with it and using it as a sharpshooter platform then maybe throw a Harris bipod on there as well.