type this into command bar
ent_setname a; ent_fire a enablegun 1; ent_fire enableradar 1
use that
if the tau cannon on jeep doesnt show up
hold c on the jeep+bodygroups then check the tau_cannon box
also run kill command i recommend it

I somehow stumbled upon them when searching through enitites provided by each individual game. It's been a few years since i found them, so i'm not actually sure how i did it.

I tried this out, but I have a question. How did you get the turrets enabled, when I try to do it, it doesn't work.

Both vehicles are identical to the original game, all that’s happened is that they were spawned in using the corresponding commands and then saved to the workshop as dupes.

Does this dupe really use the turrets they had in the original game? Did you test the dupe by spawning it in yet? I'm not sure I can subscribe to this dupe yet.