AK is a common weapon naming prefix, and can refer to seven weapons in the Call of Duty series:
- AK-47 - An assault rifle featured in the Modern Warfare series and the Black Ops series, and in Call of Duty Online and Advanced Warfare.
- AK-74 - An assault rifle in Modern Warfare: Mobilized and Modern Warfare 3: Defiance.
- AK-74u - A submachine gun in Call of Duty 4: Modern Warfare, Black Ops, Modern Warfare 3, Black Ops II, Black Ops: Declassified and Online.
- AK117 - A short-barreled assault rifle in Online.
- AKBP - A bullpup assault rifle in Online.
- AK-12 - An assault rifle in Ghosts and Advanced Warfare.
- KN-44 - An assault rifle in Black Ops III, referred to as ARAK and ARK-7 in early builds of the game.