AMERIGLO PRO SIGHT SET + 1 10MM/45 This design because of the wider than normal rear sight opening quickly pulls your eyes to the front sight, channeling your vision towards the target. There are no distracting serrations, sharp corners or odd angles to clutter your field of view. The outside edges of the rear sight have been rounded, so the shooter can acquire a better view of the target/threat in order to quickly deliver accurate shots. Further, the design allows for faster target transitions because the user can simply see better downrange. Ameriglo PRO Series sights are designed to be non-snag. They are the State of the Art in tactical handgun sights, exploiting the best of form and function for people who carry pistols in the real world.