Regarding the M series, why do they call it a DA trigger? I am new to steyr handguns, and love my M9 thus far, but I am curious about the trigger system. Clearly it is not a tradional DA or DAO trigger. The trigger wieght is impossibly light and short to be actually drawing the hammer/striker back. This is obviously done during the cycling of the slide, which would make the M series a SA trigger, or something similar. I hear it described (including by the manufacturer) as a double action trigger, but this can not be the case, at least not in the traditional sense. So what is the explanation?