FIM-43 Redeye

FIM-43 Redeye was a shoulder-launched man-portable air defense system developed by General Dynamics for U.S. ground forces. GlobalSecurity describes Redeye as a shoulder-launched surface-to-air missile using passive heat-homing guidance, and Designation-Systems.net identifies it as the first MANPADS fielded by the United States. The system's historical importance is that it gave infantry units organic low-altitude air-defense capability before the more capable FIM-92 Stinger.

Redeye's design reflected early infrared missile technology. GlobalSecurity notes its passive heat-homing guidance, while missile-system histories describe the weapon as optimized for engaging aircraft or helicopters on tail-chase courses. The operator carried a launch tube, gripstock, sight, and missile, giving a squad a compact anti-air option. Its limitations were equally significant: seeker sensitivity, countermeasure resistance, and engagement geometry were much weaker than later Stinger-class MANPADS.

Operationally, Redeye marks the beginning of U.S. portable air defense rather than its mature form. It gave troops a way to threaten low-flying aircraft, but operators had to work within narrow firing envelopes and limited seeker performance. The Redeye II program evolved into FIM-92 Stinger, which improved all-aspect engagement and reliability. For a rich equipment page, Redeye should be explained as a first-generation capability and doctrinal stepping stone, not judged only by later MANPADS standards.