 The forward 30 mm CIWS cannons were replaced by CADS-N-1.On the aft part, a single twin AK-130 130 mm gun, similar to the guns used on "Slava" and "Sovremennyy", was used instead of two 100 mm guns.Near the flight deck, the 30 mm CIWS cannons were replaced by Kashtan CIWS and moved to the aft superstructure and replaced with eight SA-N-9 vertical launchers (not installed).