Our all new Gen II Max Duty version of the original Armson O.E.G. sight designed for simple bolt on installation on any M-16/AR-15 carry handle (Gen I Max Duty pictured). The Armson Aiming Concept instantly merges the dot and target allowing two eye sighting with no loss of peripheral vision! Anodized aluminum body, high quality internal optics, and simple adjustments for windage and elevation. A fiber optic light source provides illumination during the day and the optional Tritium upgrade self-powers the sight in low light conditions (must be added as an option below). No batteries required. Our exclusive "Thru-Mount Aperture" allows you to use stock iron sights with the O.E.G. still in place. Switch instantly between Red Dot and stock sights at will. The all new Upgraded Adjuster and Knob Set is now included as a standard feature at no additional charge.