my vote would be for the k9, as I have had one for a long time, shot idpa with it this wkend. k40 prob wouldnt be too bad. trigger is a smooth rolling double action, maybe 7 pound trigger, same for every shot. gets a little better as the gun breaks in. the K9's were allowed for off duty carry for NYPD, but the dept mandated a heavier trigger, so Kahr obliged them. NYPD stopped allowing it when they discoved that when broken in good the trigger got lighter an d smoother, and became less than their mandated (8lb?) heavier pull...