The Thompson/Center Contender is unique amongst all firearms because it trades nearly every other characteristic for the ability to fire any cartridge with a quick barrel change, and with enormous accuracy. A skilled shooter can change barrels within a few seconds, making them lethal at every range and in every environment.
EFFECT:
This weapon may be changed into any other calibre below .50 BMG, taking up the typical characteristics (DMG and PEN) of weapons in that calibre.