Reflex

can refer to:
*Reflex Sight - An attachment featured in Call of Duty 4: Modern Warfare, Call of Duty: Black Ops, Call of Duty: Black Ops II, Call of Duty: Black Ops III, Call of Duty: Infinite Warfare, Call of Duty: Modern Warfare Remastered, Call of Duty: WWII and Call of Duty: Black Ops 4.
*Reflex (perk) - A Perk featured in Call of Duty: Ghosts.
*Reflex (gun perk) - A Gun Perk featured in Call of Duty: Infinite Warfare.
*Call of Duty: Modern Warfare: Reflex Edition - The Wii port of Call of Duty 4: Modern Warfare.
In addition to these, several reflex sight attachments appear in main games since Call of Duty: Modern Warfare.