Wrong answers only

Myself

Myself

I step to the side to all 3 of them so they're all facing me sideways so I get all 3 in one shot and if it fails I get a 2nd try, and if I get all 3 on one shot then it's myself

Cailou twice

caillou twice

Point the gun at each of them in turn.
Get them to stand in a line.
Since there are three of them, there will be two spaces in between them.
Fire at each of those spaces.
Then begin the pistol whipping.

Myself

shoot osama and hitler and beat cailou to death with the gun

1 for Cailou 1 for myself

give the gun to caillou