Thats a good question, I am really not sure. Years back I took the Lawman to a gunsmith to verify that. They said its indeed a single action, but when I shot it in the video it fired twice without cocking back the hammer... So I am not really sure.
Its pretty old, probably from the 1970s.
I suggest finding another gunsmith.
Oh okay, I only used him once and was not all that impressed. So yeah I will look for another.