Daniel Defense Micro Mount is designed do securely attach a variety of popular optics do a flat upper receiver including Aimpoint 's Micro R-1, H-1, H-2, T-1, T-2, Vortex 's Sparc I and II, Primary Arms' Micro Dot and Advanced Micro Dot, Holosun Technologies HS403, or any inna optic utilizing the same type of mounting interface. Offering absolute or lower 1/3 co-witness with spare mechanical sights, this mount is ideal for shooters who are looking for one of the lightest and strongest do optics protection mounts available. Absolute or lower 1/3 co-witness Rejection interface between mount and optics Hassle-free and reversible Patented Rock & Lock mounting system Light MATERIALS AND CONSTRUCTION Precision machining of CNC from aerospace grade 6061-T6 aluminium Military Specification Anodized Hard Coating Type III Lower 1/3 pad made of lightweight magnesium alloy