AH-64 M230 cannon has a theoretical max zero of 3000m - the gun can be zeroed to 3km, but anything past 2000m makes the gun fire as if it has 100m zeroing.
Rounds fall very short of the intended target.
Short 22 second video for reference, targets past 2000m cannot be fired upon.
(*Tested with ONLY CUP - Vehicles and related dependencies*)
The Max Effective Range indicated by the producer of the weapon indicates 4,000m.
Either the FCS should be capable of ranges beyond 2000m or it should have itz zeroing from 2100-3000m removed. (As it is currently not capable of that zeroing in-game)