Walther is a name that refers to a German firearms manufacturer, and the term may refer to one of four weapons in the Call of Duty series:
- Walther P38 - A semi-automatic pistol featured in Call of Duty 3 and Call of Duty: World at War.
- Walther G41 - A semi-automatic rifle unique to Call of Duty: World at War (Nintendo DS).
- WA2000 - A semi-automatic sniper rifle featured in Call of Duty: Modern Warfare 2 and Call of Duty: Black Ops.
- MPL - A submachine gun which appears in the Multiplayer and Zombie modes of Call of Duty: Black Ops.
- P99 - A Call of Duty: Modern Warfare 3 pistol that is known ingame as the P99.