Foldable Rear Sight

-Foldable Rear Sight for Flat Tops, Upper Receiver
-Precise MOA Windage and Elevation Adjustment
-Dual Apertures with the Larger Rapid Target Acquisition Aperture for CQB Operations and the Smaller Precision Aperture for High Accuracy Aiming Operations
-Compact in Size, Allow User to Attach other Applications in the Front