Single Action vs Double Action vs SA/DO

[csmsss]

"DA/SA" is redundant because it is a given that a DA revolver can be fired in SA mode.

Nope. Try to fire a S&W Centennial revolver in SA mode. You can have all day. Heck, you can have all week but you'll never, ever get that sucker to fire in SA mode.

 

[Theohazard]

"DA/SA" is redundant because it is a given that a DA revolver can be fired in SA mode.

Nope. Try to fire a S&W Centennial revolver in SA mode. You can have all day. Heck, you can have all week but you'll never, ever get that sucker to fire in SA mode.

...Which is why the Centennial is considered a DAO revolver.

 

[RickB]

"Double" action can have two meanings; first, that the trigger can both raise and drop the hammer, and B, that the gun can be fired in two ways, by either manually cocking the hammer and pulling the trigger, or by using the trigger to both cock and drop the hammer. The former is why "double action" is sometimes also called "trigger cocking".
Any semi-auto that requires racking the slide to reset the mechanism is not "double action", using either definition.

 

[csmsss]

...Which is why the Centennial is considered a DAO revolver.

Not by me, and not by anyone on earth before the development of the "wonder nines". The Centennial existed LONG before the creation of the appellation "DAO"

 

[newfrontier45]

...Which is why the Centennial is considered a DAO revolver.

Exactly! Internal hammer, no single action notch in the hammer, that's pretty much the definition of DAO.

But you're right, before we started calling them DAO, we just called them double action only.