Releasing one game a year since the seminal Modern Warfare hit shelves in 2007, the series' immensely popular multiplayer mode has given players countless weapons and gadgets to rack up kill-streaks and blow away the enemy team with every new title.
With so many variations of guns, launchers and melee weapons that have been created for every game over the years, it's no surprise that developers haven't always managed to balance each one as well as they could have.
In fact, some specific weapons and loadouts became infamous for being completely overpowered. These cheap weapons made the lives of players a living hell (and in some cases still do), with the top MVP of any given match almost being guaranteed to have been using a gun that broke the unspoken gentleman's agreement that most COD players had with each other.
Even if they were patched or nerfed post-release, it hasn't stopped some Call of Duty guns going down as some of the most BS weapons in gaming history. They were great to use, but they also made you throw the controller across the room if the killcam showed you'd been clipped by one.
10. MP7 - Modern Warfare 3
In just about every COD game there's one SMG that you can carelessly run around the battlefield with, spraying and praying while raking in the kills. The MP7 was Modern Warfare 3's version of this, and while it wasn't as ridiculously overpowered as some of the other weapons in the franchise, players could still clear out a whole room of enemies by simply holding down the trigger and not letting go until everybody was dead.
However, while the base version was already powerful, MW3's wealth of perks and attachments meant players could make the gun even more devastating. The silencer was a particularly popular choice, which combined with perks that increased movement speed, allowed players to zip around the map undetected while annihilating the enemy team.
Likewise, if someone had customised the MP7 to include rapid fire you might as well have just rage quitted on the spot, because there was no way that they wouldn't make your life a living hell for the rest of the round.