High Quality Content by WIKIPEDIA articles! The Kh-55 is a Soviet/Russian air-launched cruise missile, designed by MKB Raduga. It has a range of up to 3,000 km (1,620 nmi) and can carry conventional or nuclear warheads. Kh-55 is launched exclusively from bomber aircraft and has spawned a number of conventionally armed variants mainly for tactical use, such as the Kh-65SE and Kh-SD, but only the Kh-101 and Kh-555 appear to have made it into service. Contrary to popular belief, the Kh-55 was not the basis of the submarine- and ground-launched RK-55 Granat (SS-N-21 'Sampson' and SSC-X-4 'Slingshot').