Primary Arms Classic Red Dot Mount High Cantilever Lower 1/3 Cowitness 30mm 1.65 in Black. ) 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). If utilizing a red dot magnifier pair up with standard height flip to side mount such as PAMQF-01 or PAQDMQF-01. This tough mount features a lifetime warranty. Specifications for Primary Arms Classic Lower 1/3 Cowitness High Cantilever 30mm Mount: Manufacturer: Primary Arms Color: Black Finish: Anodized Matte Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Fabric/Material: Aluminum Tube Diameter: 30 mm Co-Witness: Lower 1/3 Red Dot Sights-Footprint: Not Applicable Optic Cut: Aimpoint T2 Height: 1.65 in Weight: 5 oz Condition: New Package Contents: Primary Arms Classic Lower 1/3 Cowitness High Cantilever 30mm Mount Primary Arms Classic Red Dot Mount High Cantilever Lower 1/3 Cowitness 30mm 1.65 in Black 910073