The Daniel Defense Micro Mount is designed to securely mount a variety of popular optics to your flat-top upper receiver including Aimpoints Micro R-1 H-1 H-2 T-1 T-2 Vortexs 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 13rd 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. Features Patented Rock & Lock attachment system.