Unity Tactical LLC FSTMICF Fast Micro Flat Dark EarthThe FAST Micro mount features built in standard height back up iron sights that keep weapons uncluttered, without reducing capability. Both front and rear BUIS are completely adjustable for windage and elevation. The front sight post can be removed so that the rear BUIS aperture can be used with a traditional front sight such as our FUSION fixed or folding sights (if present), creating a more conventional sight radius. However, the built in front rear