Maybe somebody can help answer this for me. I am researching the Bersa Thunder 9MM UC and am not sure if this is a DA/SA or DAO. I have seen conflicting statements on different reseller websites. I've never handled a DA/SA pistol but from reading some reviews on other guns it sounds like the DA/SA might be more accurate when firing in quick bursts due to the shorter trigger after the first shot. Just curious, ultimately I will probably have to see if any of the ranges around here rent this gun and the others I am looking at such as the Taurus PT111 and S&W MP9 Compact.
I find the DA to be reasonable, and the SA to be crisp, but a little too heavy for my liking. One thing I like about DA/SA carry guns is that you don't need to have an external safety engaged to safely carry (as you would with most SA guns).
I have a Thunder 9 with a few thousand rounds through it without a hitch. My next will be UC. The only criticism I have is that it is a bit bulky for my hands. Have you visited www.bersatalk.com? It is one of the better forums.