"The S-400 is a unique system. It demonstrates indisputable superiority over its rivals. Its maximum range of 380 kilometres [236 miles] is twice that of analogues. The closest another artillery system has ever come to this result is 200 kilometres, the rest fall far behind," it said.
The surface-to-air system – whose NATO reporting name is SA-21 Growler – can carry three different types of missiles capable of engaging a wide array of aerial targets, from reconnaissance aircraft to ballistic missiles, at a short-to-extremely-long range.
Saudi Arabia, Qatar, Algeria, Morocco, Egypt, Vietnam, and Iraq and at least six others are interested in buying S-400s despite the threat of US retaliation under the Countering America’s Adversaries Through Sanctions Act, according to media reports. Turkey, China, and India have already signed contracts.