AIM-120 advanced medium-range air-to-air missile, or AMRAAM (pronounced AM-ram), is an American over-the-horizon air-to-air missile, which can fight all day and night. It is 7 inches (18 cm) in diameter and is guided by active transmit-receive radar instead of semi-active radar only. It's a weapon that doesn't matter after it's launched, unlike the sparrow missile of the previous generation, which needs the guidance of the launching plane. When the AMRAAM missile was launched, NATO pilots used the concise code Fox Three. Up to 2008, more than 000 33 aircraft have been produced for the US Air Force, the US Navy and 14 international customers. AMRAAM has been used in many wars, achieving < > air-to-air killings in conflicts in Iraq, Bosnia, Kosovo, India and Syria.AIM-7 Sparrow MRMThe AIM-7 Sparrow medium range missile (MRM) was purchased by the US Navy from original developer Hughes Aircraft in the 1950s as its first operational air-to-air missile with "beyond visual range" (BVR) capability. With an effective range of about 12 miles (19 km), it was introduced as a radar beam-riding missile and then it was improved to a semi-active radar guided missile which would home in on reflections from a target illuminated by the radar of the launching aircraft. It was effective at visual to beyond visual range. The early beam riding versions of the Sparrow missiles were integrated onto the McDonnell F3H Demon and Vought F7U Cutlass, but the definitive AIM-7 Sparrow was the primary weapon for the all-weather McDonnell Douglas F-4 Phantom II fighter/interceptor, which lacked an internal gun in its U.S. Navy, U.S. Marine Corps, and early U.S. Air Force versions. The F-4 carried up to four AIM-7s in built-in recesses under its belly.Designed for use against non-maneuvering targets such as bombers, the missiles initially performed poorly against fighters over North Vietnam, and were progressively improved until they proved highly effective in dogfights.