There may come a need to put someone with the Overshield - six feet under.

Undermine the Overshield

In maps such as Beaver Creek or Ascension, and especially in Head to Head games, it may become necessary to rid your adversary of his perpetually equipped Overshield. Now would be a good time to pick up a Plasma Pistol. One fully-charged shot will have the same damaging affect on the Overshield as it would have on a regular Energy Shield and allow a quick kill. To put it simply, one charged shot from the Plasma Pistol renders an Overshield useless.