The Fab Defense Rear Back-Up Sight is a folding sight designed for AR-15 based weapons. The sight is made from a high-grade polymer and metal construction so it is lightweight and has a low profile design. The sight can be easily deployed due to the ambidextrous controls. The rear sight is finger-adjustable for windage. Mounts to a MIL-STD-1913 Picatinny rail.
Rear sight weight: 30 gr.