That revolver has a hammer that's accessible from the out side. It can be fired double or single action. Most revolvers can be staged in DA mode for greater accuracy, some more than others.Noice! If you're on board with DAO this is a great choice. I wonder, since it's never come up in my world, whether there are smiths out there who might specialize in optimizing the trigger for double action, to help with accuracy, smooth follow-ups...all like that...?