Hello! There are cool mods Armored Train (Turret Wagons) https://mods.factorio.com/mod/Armored-train , or Flamethrower Wagon https://mods.factorio.com/mod/flamethrower-wagon . But in terms of graphics, they are complete crap.
If higher quality graphics become available to modders, I think many will want to work with it....
I tried to sketch a model for a universal wagon of an armored train in rhinoceros. It looks good. https://post-images.org/photo-page.php?photo=ImxFcXB8
But unfortunately, I am a complete noob in 3D modeling...
Could you make something worthwhile out of this? I am ready to provide you with the source file. https://disk.yandex.kz/d/TrqW5DIJQxz2Kw
Thanks!