Sig Sauer X-Ray3 Day/Night Sights No 6 Front, No 6 Rear, Square Notch (Black)Sig Sauer X Ray3 Day Night Sights No 6 Front, No 6 Rear, Square Notch (Black) The X RAY3 Tritium Sights offer improved target acquisition in all light conditions, making them ideal for both work and sport. These sights feature a 3 dot tritium system that provides clear visibility in low light environments and remains bright in daylight. With steel housing for added protection and durability, the X RAY3 sights are built to last. Installation of these