How many polygons/vertices can a game model have?

Question

Game development

How many polygons can be on weapon models? As far as I know, the norm for automatic weapons is about 10k (polygons), pistols are about 4k.
And how much can a car model have? I’m just looking at car models in the Anrial store, cars have at least 50k polygons there, and on some CGTRADER cars can have 200k-700k polygons.
If you're playing an open world game like GTA on phones, how much polygonal cars should you use?
I hope I explained clearly.

Answer 1

Polygons are not the main thing now, the sophistication of shaders and lighting also affect.

Answer 2

There are no rules.
Obviously, the smaller, the faster it will work, but it will look worse. It is necessary to reach a compromise when it is already small, but still beautiful.