Detachable Fixed Front and Rear Sights for the AR-15. Both front and rear sight are A2 style and adjustable for windage and elevation. Rear sight features small and large (0-2) apertures, just like the A2 carry handle sight. Both sights are 1913 rail compatible and attach with large thumbscrews similar to those found on the M4's detachable carry handle. Front Sight is for use on a Picatinny Rail Gas Block only, and will be too tall for use on a railed handguard. Solid aluminum construction with anodized matte finish. Compact enough that you will still be able to mount a red-dot/ reflex/ holographic optic on your AR-15 upper receiver.