How about being able to pick up ammo from the dead, but only what they had left. It would have to take some time like it does to reload and you can only do it once when out of ammo. Honestly I think I've only run out of ammo once or twice. Usually I don't last more than 5-10 minutes on the field. In fact lately I haven't been able to get across a field without someone getting a lucky shot off. I'm thinking of changing my nick name to "Fodder"