The AH-64 Longbow is an attack helicopter developed to replace the AH-1 Cobra. Primarily used by the U.S Army, the AH-4 first flown on October 1 1975 and produced in 1984. The helicopter can accommodate 2 crews: 1 pilot and a copilot/gunner. The copilot/gunner sits in the rear seat, which is raised and has good all-round visibility. The two 1690shp General Electric T700-GE-701 turbines are mounted on either side of the fuselage, behind the rotor transmission, in two separate nacelles. The four-blade metal rotor is of the articulated type with the blades angled at 60°/120° in relation to each other to reduce noise levels. The tail unit, which was modified during the aircraft's second development phase, includes an all-moving tail plane positioned slightly above the tail boom and a vertical fin to replace the earlier T-tail of the prototype. The tailwheel landing gear is fixed.

The AH-64D, an advanced variant of Apache Longbow, is equipped with an improved sensor suite and weapon systems. It has very similar features with the AH-64C series with the exception of having a removable radar. The Longbow radar is a millimeter wave radar produced by Northrop Grumman and can guide the potent Hellfires through radar seeking frequencies for an even more improved kill ratio. The AH-64D Apache Longbow is powered with an updated engine (General Electric T700-GE-701C of 1,890 shaft horsepower). The AH-64D Longbow also features noticeable radome (Fire Control Radar - FCR - target acquisition system) on top of main rotor mast, updated navigation and communications, improved crew survivability, integrated radio-based moden for multiple target tracking, planned UAV support function, and further systems digitization.