If your handgun comes with fixed sights, and shoots to point of aim, well and good. If not, you have to mess with the fixed sights, change to adjustable, or experiment with Ammo. Both a CZ75 I had and a Beretta my friend just purchased, shot considerably low with the fixed sights. My solution was to install an adjustable rear sight. The P1 I purchased also shoots low. I may be able to get a lower front sight for it, otherwise it will be a file job.
Bill