Fab Defense Front/Rear Flip Up Sights AR-15 M4 M16 Folding Style

Fab Defense Front/Rear Flip Up Sights Features The Front/Rear Back-Up Sights comes with the FBS a low-profile durable auxiliary front sight. It is readily mounted on any 1913 Picatinny rail making it ideal for use on M4/AR-15/M-16 platforms. The sight can be used as a primary or back-up sight and the ergonomic angel-wing-shaped front shroud helps center the image with any rear sight. The RBS is a low-profile durable auxiliary rear sight. It is readily mounted on any 1913 Picatinny rail ma