One of the issues I always had with the ammo boxes in this game is that they only worked with the sniper and rocket launcher. With some scripting magic I have been able to get them to work for all weapons that are ammo based. This doesn't work with weapons that are percentage based such as the sentinel beam or the sword.
Map is in file share
Gt is MartianMallCop
Map is in file share
Gt is MartianMallCop