Paladin, sadly I cannot give you much more info on the 3914 DAO. I got most of what I know about it from a salesman at Standard Law back in 2010 when I was considering one for off duty use. Then I found a LNIB 3954 instead. After shooting it, I found the trigger to be unlike any revolver Id ever shot and eventually sold it.
I know they were made up until a couple of years ago as I have seen two with Houlton ME laser etched on the slide. You may want to PM member MTSCop. IIRC he uses one duty. Regards 18DAI
I'm on it! Thanks.
John