Some questions to make a scope mod

[AchoKaracho]

Hello everyone
I have a question.
How does zeroing work when I do a scope mod?
Is the weapon zeroed or the scope?
What do I have to do if I'm on a sniper weapon, e.g. Boltaction and want to use multiple scopes?
If I create a scope with e.g. 1-6x, one with 3-12x and one with 5-25x (specifically for this weapon), do I have to make a new weapon for each scope (for the armory) so that it is correctly zeroed with each scope?
So that I can hit where I'm aiming with the scopes, the scopes have to be zeroed to the specific weapon?
Should I put the weapon in the armory with the different scopes preinstalled?
Can these scopes also be used on other weapons, or do they only work (zeroing) with this weapon?

What happens if i use these scopes on other weapons?