Russia’s Almaz-Antey defense manufacturer delivered the second regiment set of S-400 anti-aircraft missile systems to the Defense Ministry, the company’s press office reported on Wednesday. This reported by TASS.

"The Almaz-Antey Group delivered the second regiment set of S-400 surface-to-air missile systems to the Defense Ministry this year. The handover ceremony was held at the Kapustin Yar proving ground in the Astrakhan Region," the press office said.

The second regiment set of S-400 air defense systems was delivered to the Defense Ministry ahead of schedule, the press office quoted Almaz-Antey CEO Yan Novikov as saying.

Pursuant to the requirements of Russia’s Defense Ministry, the air defense systems were delivered to the proving ground where they tracked real air targets, the press office said.

"Following the results of initial firings, the systems operated without a hitch and the delivery/acceptance trials passed successfully," the press office said.