Modern Warfare 3/P-99

The P-99 is in the exact same situation as the USP-45. I wouldn't use it unless the later handguns weren't unlocked. It takes a long time to kill enemies because of its low damage and bad accuracy. I would only use it with the akimbo or tactical knife attachment. It's semi-automatic.

Modern Warfare 3/ USP-45

The USP-45 is a pistol I would only use if the later pistols like the .44 magnum or the five seven handgun weren't unlocked. It takes a long time to kill your enemies with this gun too because of its low damage and bad accuracy. It would be a lot better with the akimbo, or duel wield, attachment but that gets unlocked at the gun's 5th level. The tactical knife is unlocked at the gun's 7th level. Having a tactical knife speeds up the melee attack process.It's semi-automatic.