NEW DELHI -- India will receive its final S-400 air defense system by 2025, according to Russian deputy chief of mission Roman Babushkin. Russia is already building the S-400s destined for delivery to India. The S-400 is an upgraded version of the S-300 surface-to-air missile (SAM) system.
Almaz-Antey is the prime contractor for the S-400 program. This system has been in service with the Russian armed forces since 2007.