I need to know how to change what weapons spawn on a map.
I want to do a certain map only using the Sniper, I think it's called the Nex, not completely sure.
Anyway to do this?

You don't need to change the map at all- just turn on the "minsta" mutator for your server in the menu (when hosting the game). That will make all weapons the Nex, and all ammo into Cells (I think).

Thank you so much.