Since a gun is nothing but a tool suited to specific purposes, the poll is meaningless.
While necessity has prompted me to use a flat-tipped screwdriver to pry out the occasional phillips screw, the screw, and often the screwdriver, is useless afterward.
I have resorted to using a sledge hammer to nudging nails out of the way, but that's not very effective. I suspect an AK-47 would work better. But then again, I generally use the big hamers to knock the walls down, and AK-47 are good at making the perforated edges, but someone still has to tear the coupon out, right?
However, when someone is shooting a gun at someone, the general idea is to render the target permanently useless, so in most of the cases listed, the AK-47 would be adequate to the chosen task.