How does buying weapons work?

[Venoxile]

Aight, they've gone into the complex stuff with the game info, but my question is: Lets saying you join a game, you'll start out i think at one of your side's bases, so what do you do from then? Is it like counter strike where you buy your weapons, and then gain money to get better weapons by killing? Or is it like renegade, where you buy your class by getting money by killing stuff? I really hate the renegade class system, it's just fruity. I'd like it if you just bought whatever weapons and armor you'd like, and could be dropped off at whatever point you choose.

So how do you choose your weapons/equipment?