FAB Defense RBS AR-15 Iron Sight Rear Flip Up - FX-RBS

The Fab Defense RBS is an advanced, dual aperture, durable and low-profile rear backup sight. It can be used with any front sight and was designed for more accurate aiming and faster target acquisition. Windage is easily and quickly adjusted without tools. The RBS is readily mounted on any 1913 Picatinny rail, making it ideal for use on AR-15 platforms and on the FAB Defense KPOS. An ergonomic angel-wing shaped shroud helps center the image with any front sight, and when used with a matching FAB