There's another thing to consider with the Glock factory sights. With most other pistol sights, you line up the tops of the front and rear sights. I think with the Glock sights, the middle of the front sight white dot is supposed to line up with the top of the rear sights. Lining up the tops of the sights will make it shoot low.
EDIT: Also, my personal opinion is that bisecting the middle of a target is the more natural and repeatable way of shooting, as opposed to putting the front sight underneath the central ring of the target.
EDIT: Also, my personal opinion is that bisecting the middle of a target is the more natural and repeatable way of shooting, as opposed to putting the front sight underneath the central ring of the target.


















































