This is an SAA 240mm mortar in action on one of the Ghouta fronts. Its max range is 10km and the shell weighs 130 kg.
The up-armored SAA ZSU-23 is typically used in a direct fire support role for ground troops. Its designed, though, as an anti-aircraft platform.
SAA T-55MV. This tank has the Kontakt explosive reactive armor.
