Adjustable Co-Witnessing Red Dot MountThe Adjustable Co witnessing Red Dot Mount from Outer Impact allows the shooter to utilize a variety of red dot sights on any rifle with a picatinny rail, as well as allowing the shooter to dictate the height of optic or level of co witness they prefer, from absolute to lower third and multiple points in between. The Outer Impact Adjustable Co Witnessing Red Dot Mount consists of 2 parts: Base Mount Top Plate (3 options available) The Base Mount and