The K-5 is a short-range air-to-air missile developed by the Soviet Union in the 1950s. It uses beam-riding guidance (which means its target must be illuminated by radar) and has a high-explosive warhead. This weapon can reach a speed of Mach 2.3 and has a range of 2 to 6 kilometres. K-5s were designed to be launched from Soviet aerial interceptors against large, unagile targets such as bomber aircraft. It was later replaced by the K-55 missile with improved seekers.