Primary Arms Classic Red Dot Mount High Cantilever Lower 1/3 Cowitness, 30mm, 1.65 in, Black, 910073

) to allow for a lower 1/3rd cowitness. A lower 1/3rd co-witness places the red dot in the bottom part of the scope tube when aiming down the iron sights. This allows a less obstructed view of the entire scope tube when using the red dot instead of the iron sights. (Sight in photo not included).