The Beretta U22 NEOS has the top weaver style rail for you to mount optics. Depend on which red dot you get, there is always the wiggle room for you to adjust to fit what works for you. The key is to mount it where the weight of the gun is balanced in your hands, and it's consistent for you to pick up the red dot. The only way to truly find out is to go to the range and test it.