Dispenser

Metal Cost 180
Time To Build 2.5 Secs
Damage When Detonated 250 Units

Dispensers are built by engineers who have the ability to add armor and ammo to them which you can use to supplement your own supplies. They are useful when built far from resupply points - a dispenser right next to a resupply point is pretty useless. You can fill up dispensers youself but they also manufacture their own supplies every ten seconds. Sneaky engineers also put them in narrow corridors around the exits to flag rooms making it hard to get past them - this is downright annoying when it happens to you but pretty funny when you are that sneaky engineer.

A particularly annoying tactic is for the engineer to blow their dispenser while you are walking past it or stuck trying to get past it in a narrow corridor - the blast damage depends on how much ammo is in the dispenser but a fully charged dispenser has massive explosive power and can take out pretty well any class with one blast.