The Ukrainian army before the Russian invasion had an indeterminate number of russian ZSU-23-4 Szyłka sets, which actively participated in the 2014 battles (and later). Most of them, however, were on equipment retention units in different method condition, and only a fewer twelve pieces were in active service. Despite respective proposals to modernise the Shiłek fleet (as [ZSU-23-4M-A1](https://defence24.pl/war-na-ukrainie-report-special-defence24/Ukrainian-renovation-switch-further-on-front)), the case was limited to gradual refurbishment of subsequent vehicles, but not adequate to fill the gaps in capabilities. As you can see, the process of restoring them to service continues, as evidenced most most likely by the pictures below from 242. Unit Training Center.
