The MBB Lampyridae, or Firefly, was a low-observable medium missile fighter (MRMF) developed in 1980 by the German aerospace company Messerschmitt-Bolkow-Blohm (MBB).
Developed independently of the Have Blue prototype and Lockheed’s F-117 stealth fighter, the Lampyridae nonetheless utilized a similar approach. The design was revealed to the US in 1987 when a group of USAF officers were shown the piloted model, which was kept in a closed-off section of MBB’s plant at Ottobrunn in Bavaria. The project was canceled soon after for unspecified reasons. Reportedly, later calculations suggest the Lampyridae could have achieved a lower frontal RCS than the Lockheed F-117 Nighthawk aircraft.