Rapid target acquisition is essential in a critical situation. This sight system was designed by two highly experienced U.S. Special Forces veterans, the R4E Optimized Duty Sights features FIVE elements for sight alignment. Three vertical features and two horizontal lines produce a reticle type sight picture that dramatically improves target acquisition time. Green Tritium enhanced elements on the rear sight improve target acquisition in low light situations. These sights give you the ability to swiftly line up your sights target, which is vital to any competitive shooter, and essential to law enforcement and defensive shooters.