Eotech 552 holosight. Hopefully this will be sitting on top of a Steyr SPP by the time Modern Warfare 2 and its mod tools come out...as you can see there are still issues with it...most obviously the part where it slides onto the rail is way too thin. That's going to require some work on the panel though
The text on the panel is actually cut in, its not booleans or floaters. That took ages.