The Daniel Defense Micro Mount is designed to securely mount a variety of popular optics to your flat-top upper receiver including Aimpoint's Micro R-1, H-1, T-1, Vortex's Sparc I & II, Primary Arms' Micro Dot & Advanced Micro Dot, Holosun Technologies HS403, or any other optic utilizing the same type of mounting interface. Offering Absolute or a Lower 1?3rd Co-Witness with your back-up iron sights, this mount is ideal for shooters who are looking for one of the lightest and strongest mounts available to secure their optics..