How much damage did the pistol do?

Im asking because im going to make a map that features the pistol and need to know How many shots on average did it take to kill some one in halo combat evolved with the pistol.

3 headshots. Stupidly overpowered.
The one in reach though which is the engine Halo CE:A multiplayer will use is 5 shots. 4 to pop the shield then 1 head shot will get the kill.