Russia has started production of S-400 long-range surface-to-air missile systems for India. All five units will be delivered to India by 2025. The S-400 air defence missile systems are among the best in the world and it would serve well for Indian security.
India signed a USD 43-billion deal with Russia for the purchase of five S-400 systems during the 19th India-Russia Annual Bilateral Summit in New Delhi on October 5, 2018, for long-term security needs.