XS DXW2 Big Dot Tritium Night Sights offer the best front sight visibility in all lighting conditions. DXW2 Big Dot sights drive focus to the front sight using a high-contrast front and a V-notch rear for an unobstructed view of the front sight. The dot-the I sight picture, with a tritium dot in the front sight and a non-tritium white stripe in the rear, prevents confusing the front and rear sight in high-stress situations. In most gunfights, the victim and attacker are both moving and the victims focus is drawn to the threat. The wide field of view increases visibility of the front sight and of the threat downrange.