Does self supply apply on here?

I know i have been on other RP servers where gun dealers aren't allowed to have anything better than a pistol otherwise it's 'Self supply' or something. Does that apply on here? If not, please don't make it a rule. I understand the concept and everything, but for me it seems kinda pointless.

Self supply means you go gun dealer, purchase a weapon, change jobs and pick it up

That's self supplying and it is not allowed

However buying an assault rifle for yourself to protect your own shop or showcase the weapon to others as a gun dealer isn't a problem

Unless you go and shoot people randomly with it, then it's a problem.

Also if you buy a shipment of M4s to sell and you don't manage to sell all of them you can keep them.