Painted

Let it also be known that a single action gun has a heavy, long trigger pull the first shot, however the rest of the shots have a very light and short trigger pull. Some may find this easier to shoot straight. (Actually I am not sure that all SA guns have the heavy trigger pull for the first shot, maybe someone could verify this)

A double action gun, on the other hand, has heavy and long trigger pulls for all shots.

I hope this makes sense to you, and gives a reason for the two kinds of actions.