in service - Operations in Iraq [Operation Iraqi Freedom (OIF)] and Afghanistan [Operation Enduring Freedom (OEF)]
United States Army
AH-64D Apache Longbow - equipped with AN/APG-78 Longbow millimeter-wave fire-control radar (FCR) target acquisition system, which is capable of simultaneously tracking up to 128 targets and engaging up to 16 at once
AH-64E Guardian - Formerly known as AH-64D Block III in 2012. it can control unmanned aerial vehicles (UAVs), full IFR capability, and improved landing gear, new composite rotor blades. 634 AH-64D will be upgraded into AH-64E.