India to Receive Five S-400 air defence systems from Russia by 2025

Russia to deliver all five units of S-400 long-range surface-to-air missile systems to India by 2025.
The S-400 air defence systems is an upgraded version of the S-300, which is used by Russian defence forces.
India signed USD 5.43-billion deal with Russia for the purchase of 5 units of S-400 systems on October 5, 2018, during the 19th India-Russia Annual Bilateral Summit in New Delhi.