How many trees do you expect to find in Iraq? You have to understand that the Apache was designed for a major land war in Europe and it was the Army’s' version of the A-10 Warthog in that it would get down and dirty with the tanks and armored vehicles. With the installation of the hellfire missiles the Apache could be used as a standoff weapons system. A further development was the inclusion of a mast mounted mm Wave RADAR which allowed the apache to observe the enemy while hiding behind trees or natural obstructions such as hills or rock projections.
I will adjust my first comments to state "How many trees, natural obstructions, hills or rock projections do you expect to find in Iraq"?
The ZSU-23-4 I believe has RADAR, optical and IR sighting capability and if it is used by the armed forces of Iraq it can defeat all of defensive systems on the Apache except the M1
Mk1 eyeball of the pilot gunner and then they may be on an even playing field.
And if the fighting is at night there is an excellent chance that the static corona discharge from the blades will provide a very good target.