You can get a 3/4 or 1inch riser from pretty much anywhere to attach to your flat top and raise the scope over the front site. They range from 20 -40 or so bucks most places. I traded for a leupold mark 4 40mm scope and with illuminated reticules and it is awesome. it has too many knobs, but it is like looking through a camera lense. I think that think is the apex of rifle scopes and as the military uses them, it will make the ar look like serious business.
"A gun is a tool, Marian; no better or no worse than any other tool: an axe, a shovel or anything. A gun is as good or as bad as the man using it. Remember that." -- Shane
Who is John Galt?