Video released by the crew of a Ukrainian Shilka SPAAG captures the anti-aircraft weapon being used in a ground suppression role somewhere on the Eastern front.

You're looking at two ZSU-23-4 Shilka 23mm self-propelled anti-aircraft guns in this video. The gun in the back appears to be depressing it's barrels to join in on the fighting, however the weapon system in the front of the duo is already engaging a Russian position according to the source of this footage. It's unknown where this video was recorded.