Over a period of 24 hours there was a time in Call of Duty, when a sniper rifle acted almost like a smartbomb. During that period, players using it felt like they were insta-killing gods in multiplayer.
The gun in question was Proteus, and it is a hybrid of a sniper rifle and a shotgun. These 2 modes can be switched between on the fly. In its sniper mode, the gun fires 3 rounds in one shot, However it didn't work as planned when fired from the hip. Instead it took out anyone who was standing in the line of fire, taking down up to 3 enemies at once. Which needless to say had a pretty huge impact.
To see this now a mere foot note in the history of Call of Duty, and you can check out a video of it here.
The Call of Duty community is now trying to find a way to add this broken version of Proteus back in for custom games, cause while broken it was also fun.
Thanks, PCGamesN.