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The Proteus is a sniper rifle that was added to Call of Duty: Infinite Warfare in the June 27th, 2017 update. The Proteus is very unique as it is a pump action sniper rifle/shotgun hybrid, and it behaves as a buckshot while hipfiring and as a slug while aiming down the sniper scope. Shotgun mode has around eight pellets per shot, while in Sniper mode it only has three pellets.
The Proteus can obtained from the Magic Wheel in Attack of the Radioactive Thing and was added to the four previous maps. it is very powerful against the zombies and will blast them into a gory mess.