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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

"18.0" barrel slightly increases muzzle velocity and extends range with very little additional weight."
— In-game description

The FSS 18.0" Factory is a barrel attachment featured in Call of Duty: Modern Warfare and Call of Duty: Warzone. It is uniquely available to the MK2 Carbine.