There is a variation called a SUB-6 hold for pistol shooters.
The difference is the front sight is below the bull with a separation (white) the same as the white on both sides of the front sight.
The idea is you have 3 equal size white on both sides and top of the front sight.
If you are like me, used to a 6-oclock hold, transitioning to a sub-6 is HARD, but I changed to it for AP.
The brain has to be retrained from MANY years of using a 6-oclock sight picture.