MILDAR = Millimeter Wave Radar
no the performance specs provided for MILDAR is incorrect or overly optimistic.
Its common sense really, millimeter wave radar is short ranged because its limited by atmospheric attenuation. Perhaps the specs the Turks provided was measured in vacuum.
Light Weight, Small Size, Effective Range
Its power amplifiers incorporate solid-state technology.
and during the tests, MILDAR Radar managed to reach up to a 27km range in clear conditions.
on the other hand new LONGBOW version managed to reach up to a 16km range in clear conditions
AH-64D Apache has LONGBOW Radar with range of 8-12 km ( air and land targets )
AH-64E Guardian has new LONGBOW’s Version 6 Radar with the new software modes and functions
Apache AH 64 E struck a moving target 32 km away. Beyond the range of its on longbow radar today we speak of cooperative target engagement so the platform isn't limited by onboard sensors.
MILDAR enhances the lethality and survivability of the platform during combat when it operates integrated with the weapons and other sensor systems onboard transforming the helicopter into a significant force multiplier in the battlefield
MILDAR Radar has also cooperative engagement capability
Turkey needs to finish TEMREN-II missile project with range of up to 30 km ( based on MIZRAK anti tank Missile )
Edit: the APG 78 does not weight 200+ kg, I think you are comparing apples to watermelons.
For some perspective, the Su30 MKI BARS radar weighs 650 kg.
The weight of the LONGBOW radar mounted above the mast is 136kg and the total weight on the Helicopter with other sub-systems is 227kg
MILDAR is more lighter than LONGBOW
so American AH-64 has LONGBOW Radar
French-German TIGER doesnt have fire control Radar
İtalian AW-129 or AW-249 doesnt have fire control Radar
Russian KA-52 has ARBALET Radar
China has its own YH fire control Radar project for Attack Helicopters
Turkey will be one of 4 countries in the world that will use its own fire control Radar on its own Attack Helicopter