I think Some of the very early Mod 12's did not have a disconnector. Same as the old Win 97. and other early models of shotguns. I don't know the year, but it was later determined that they ALL had to have a disconnect. My Win 97 is like that, and if you aren't careful, it will discharge if you are chambering the first round with your trigger depressed. KNOW THE WHEREABOUTS OF YOUR TRIGGER FINGER. Been there and done that.