The S400 missile system (NATO : SA-21 Growler) is an improved S300, introduced in 1989, which uses a very long range (400km) 40N6, a long range (250km) 48N6, a medium range (120km) 9M96E2 and a short range (40km) 9M96E missile. The S-400 is mounted on the 5P85SE2 launcher mounted on a MAZ-534M tractor trailer.