I have a Glock 21, 45 auto. I love the gun. I'm not having trouble being accurate AND fast with the gun and it fits and feels perfect in my hand. The only things I'd like to hone in on is maybe a slightly lighter trigger pull and the sighting system. The factory sighting system is fine and serves it's purpose, but when trying to "drive a nail", I find that the front sight has alot of "wobble room" in the rear sight. The white dot in front has plenty of spare room all the way around it when placed in the rear sight. My question is, is anyone familiar with a SIGHTING SYSTEM that is tighter in alignment than the factory sights. I'd like to have sights that are "exact" in knowing exactly where to align the target, maybe similar to "battle sights" that can be found for rifles. Thanks in advance everyone.