[glockarmor]

For personal use I grind all my serrated triggers smooth and take enough off of the bar in the middle of the trigger that it is flush with the trigger when I pull it. I would imagine that Glock didn't intend for it to protrude when the trigger is depressed but tolerance wise it's safer to err on the "long" side rather than the possibility of the trigger safety being too short and the pistol not firing.