I run optics on all my weapons ( E0tech, Trijicon's, and Aimpoints, I also run QD in all of them from excellent manufactures, but Spuhr mounts and all their products are at another level IMO.
Lower 1/3 Co-witness
Height: 42 mm/1.65"
Weight: 80 g/2.8 oz
Fits the following red dot sights (though height may vary for non-Aimpoint sights):
Note: Does not include an Aimpoint sight. For Aimpoint CompM5s add 10 mm/0.8" to the height.