Anti-tank guns aren't necessarily "antique" weapons, but by the mid-to-late 1990s, most modern militaries had moved on from them and were employing ATGMs, exclusively, to do the job.
It's 2022 and Ukraine needs all of the AT capability it can muster. They're dusting off another oldie-but-goody,
https://www.thedrive.com/the-war-zon...anti-tank-guns
I've done some research on AT guns for T2k (I think they'd be back in widespread by year 2 of the Twilight War), but somehow I missed that
this one has a radar to see through smoke and dust on the battlefield.
-