started my handgunning skillset only as a plastic striker-fired shooter, I might've felt differently. The significant bulk of my service revolver training was all done in DA, although some of the slower precision shots out at 50yds were occasionally allowed, depending on the course-of-fire. Cocking service revolvers into SA in high stress situations occasionally resulted in some tragic ND's in earlier times, which was the driving force for some agencies requiring DAO revolvers, so they couldn't be thumb-cocked in SA with a light (3lbs) trigger. I still favor my 3rd gen S&W's as my "go to" retirement CCW choices ... if I'm not carrying one of my DA or DAO revolvers. I certainly logged enough tens of thousands of rounds through them since I began carrying an issued one in '90. As has already been mentioned by someone else in this thread, I also grew to favor the original P99 action, which offers DA/SA (if the striker firing pin is decocked via the decocking button after the slide is cycled to chamber a round). I ordered a couple of the licensed S&W versions, the SW99, after I started attending some armorer classes for them and carrying an issued one at work for a while. Between my own SW9940 (4.1"/.40) and SW999c (3.5"/9), my issued SW9940 and some others in the inventory, I've put a few tens of thousands of rounds downrange through those, too. Nice guns. The days of the striker-fired service pistol are upon us, though. Simpler for gun makers to produce, and simpler to train new (or average) users to reach whatever is considered an acceptable level of competency by the agency handing out the guns. Generally simpler to repair and support, too. I remember when the DA revolver was the "standard", and cops were expected to learn to run them hard and accurately, in DA. History.