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Call of Duty Wiki
Call of Duty Wiki
The subject of this article appears in Call of Duty: Infinite Warfare

Chamber Stack is featured in Call of Duty: Infinite Warfare. It is integral to the Widowmaker and Hailstorm. The Widowmaker features a unique Chamber Stack for a predictable two-round burst fire. The Hailstorm has a triple Chamber Stack for rapid three-round bursts.