The FIM-92 Stinger is an American man-portable air-defense system (MANPADS) that operates as an infrared homing surface-to-air missile (SAM). It can be adapted to fire from a wide variety of ground vehicles, and from helicopters as the Air-to-Air Stinger (ATAS). It entered service in 1981 and is used by the militaries of the United States and 29 other countries. It is principally manufactured by Raytheon Missiles & Defense and is produced under license by Airbus Defence and Space in Germany and by Roketsan in Turkey. Description The FIM-92 Stinger is a passive surface-to-air missile that can be shoulder-fired by a single operator (although standard military procedure calls for two operators, team chief and gunner). The Stinger was intended to supplant the FIM-43 Redeye system, the principal difference being that, unlike the Redeye, the Stinger can acquire the target from head-on, giving much more time to acquire and destroy the target. The FIM-92B missile can also be fired from the M1097 Avenger and the M6 Linebacker. The missile is also capable of being deployed from a Humvee Stinger rack, and can be used by airborne troops. A helicopter launched version exists called Air-to-Air Stinger (ATAS). The missile is long and in diameter with fins. The missile itself weighs , while the missile with its launch tube and integral sight, fitted with a gripstock and Identification friend or foe (IFF) antenna, weighs approximately . It has a targeting range of up to 4,800 m and can engage low altitude enemy threats at up to 3,800 m. The Stinger is launched by a small ejection motor that pushes it a safe distance from the operator before engaging the main two-stage solid-fuel sustainer, which accelerates it to a maximum speed of Mach 2.54 (750 m/s). The warhead contains of HTA-3 (a mix of HMX, TNT, and aluminium powder) explosive with an impact fuze and a self-destruct timer that functions 17 seconds after launch. To fire the missile, a BCU (Battery Coolant Unit) is inserted into the gripstock. This device consists of a supply of high-pressure gaseous argon which is injected into the seeker to cryogenically cool it to operating temperature, and a thermal battery which provides power for target acquisition: a single BCU provides power and coolant for roughly 45 seconds, after which another must be inserted if the missile has not been fired. The BCUs are somewhat sensitive to abuse, and have a