The M1911 is a .45 ACP handgun. An M1911 with the word "Sally" engraved on it is seen at the end of both Call of Duty: Black Ops trailers and on the cover art.
The M1911 is a secondary pistol in Black Ops. It takes about 3 shots to kill an enemy at close range and about 5 shots to kill an enemy at medium to long range.
The M1911 is the starting weapon for all zombie maps when playing Zombies.
The M1911 is most effective at earlier rounds (up to round 5) for accumulating points. It should be used for weakening a zombie before knifing.