The U.S. Army-designed AGM-114 Hellfire missile is an air-to-surface missile used on attack helicopters and unmanned combat aerial vehicles. Originally intended as an anti-tank missile, it proved effective against a wide range of helicopter targets. It has also been used against terrorist targets by Central Intelligence Agency and Air Force MQ-1 Predator and MQ-9 Reaper/Predator B unmanned aerial vehicles. While most versions are helicopter or UAV launched, the Army is working on a HMMWV launcher.
It has undergone numerous upgrades and variations.  Originally intended as a laser-guided antitank weapon for the AH-64 Apache, it started with a maximum range of 8000 m/8750 yd and minimum effective range of approximately 1500 m/1640 yd. The first version had an 8 kg/18 pound shaped-charge warhead
|AGM-114A||Army AH-64 Apache attack helicopter||Basic antitank warhead|
|AGM-114B||Navy and Marine AH-1 Cobra attack helicopter||SAD (Safing/Arming Device) for safe shipboard use. Thiokol TX-657 (M120E1) reduced-smoke rocket motor as well as some improvements to seeker and autopilot.|
|AGM-114C||Army||Thiokol TX-657 (M120E1) reduced-smoke rocket motor as well as some improvements to seeker and autopilot.|
|AGM-114F "Interim Hellfire"||Army||Dual warhead to defeat reactive armor; better guidance with slightly reducd range|
|AGM-114K "Hellfire II"||All services; -KBF sold to Sweden||Larger warhead; multiple attack flight profiles, fuzing options; range inproved over F model|
|AGM-114L||Army||Compatible with AN/APG-78 Longbow millimeter radar or AH-64 ApacheTarget Acquisition and Designation Sight (TADS)|
|AGM-114M||Navy MH-60R||Blast-fragmentation warhead; improved SAD|
|AGM-114N||Navy||Thermobaric warhead; while the exact filler composition is classified, it contains fluorinated aluminium powder layered between the warhead casing and the PBXN-112 explosive fill|
|AGM-114P||CIA and others||Optimized for UAV high-altitude firing|
For a variety of reasons, the Hellfire's technology is aging and not always appropriate, and several nations and consortia are seeking alternatives. The U.S. alternative, still in development, is the Joint Air-Ground Missile. Britain, and presumably some other European countries, have implemented the Brimstone missile, made by MBDA.
In some UAV applications, the Hellfire still has too large a warhead for engaging targets in populated areas, and other options are being explored, such as a guided 81mm mortar round.
- Parsch, Andreas, Boeing/Lockheed Martin (Rockwell/Martin Marietta) AGM-114 Hellfire
- AGM-114N Metal Augmented Charge (MAC) Thermobaric Hellfire, Globalsecurity