Guns and Ammo

I'm currently making a map where you pick up guns [An item] and specific ammo for each gun. When the Ammo Runs out [Charge I would think] the gun no longer shoots. [Obviously lol]

I've been trying with some different things but none have worked.



Any Ideas or Tutorial suggestions for this?|||i'll take a look a that tomorrow..|||I have uploadet a map, but its only an exsample and only works for 1 unit.

The rest you can figure out..

Map: http://www.mediafire.com/?n2wnwzmmkmm