I have an Aimpoint clone on mine (money IS an object for me
), but it has no magnification. Just a 5 MoA glowing, floating, red dot. If you don't know about "MoA"... simply put, at 100 yards the dot in my aimclone covers a 5 inch diameter area on the target.
If I had some money to blow and something longer than my 16" barrel, I'd go with an Aimpoint ML3(the one with the 2 MoA dot) and an Aimpoint 3x magnifier on a flip-down mount. That way you can use the magnifier for the long shots, then drop it out of the way for the short stuff.
See sheltot's post near the bottom of
this page.