Russian Defense Ministry has signed a contract for air defense missile S-300V4 Almaz-Antei 1203122.

Defense News - Russia

The deal was signed by Defense Minister Anatoly Serdyukov and Almaz-Antei director Vladislav Menshchikov.

"In accordance with the contract, three battalions of S-300V4s will be delivered and put in service in Russia's southern military district, the Ministry said.

The S-300 system is a family of long-range air defense missile systems capable of engaging all types of airborne threats including UAVs, helicopters and planes, and ballistic and cruise missiles. The S-300 system is widely acknowledged as one of the most capable systems of its type in the world.

The S-300V4 is the latest modernized variant of the S-300V and VM systems and has higher performance thanks to the use of uspecified upgraded elements.

Independent think-tank Air Power Australia claims the S-300V4 upgrade will be designated by NATO as the SA-23 system.