I was wondering how you know if a server has the unlockable weapons or not before you enter a server.
They should say if they're officially ranked servers or not. Just use the filter on the ingame browser.
so they have to be ranked
In the demo, all servers are unranked, and all are locked... there are no "officially-ranked" servers in the demo Some servers are modded to have the unlocked weapons for everyone, but you cannot see it from the in-game browser. However, in the final game, an unranked server could choose to allow unlocked weapons to everyone, and in that case, in the server settings, you will see "Allow Global Unlocks --- 1"