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The subject of this article appears in Call of Duty: Modern Warfare (2019) The subject of this article appears in Call of Duty: Warzone

"Designed to improve muzzle velocity range with as little additional weight as possible."
— In-game description

The M91 Special Forces is a barrel attachment featured in Call of Duty: Modern Warfare and Call of Duty: Warzone. It is uniquely available to the M91 light machine gun.

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