The Trijicon Dual Defense Kit combines the legendary RMR and the Suppressor/Optic Height Sight Set into one, easy-to-use kit. This new kit adds speed and precision to your Commercial Variant M17/M18 self-defense, law enforcement, military, competition, or target pistol. The Suppressor/Optic Height night sights are engineered to the optimal height so that the iron sight can be seen through the optic lens. Having co-witnessed iron sights helps you quickly acquire the red dot, and if necessary, provides a backup aiming solution.