The front and rear back-up sights come with the FBS, a low-profile durable auxiliary front sight, and the RBS, a low-profile durable auxiliary rear sight. Both mount on any 1913 Picatinny rail, making them ideal for M4, AR-15 and M-16 platforms, and can be used as primary or back-up sights.
Ergonomic angel-wing-shaped front shroud helps center the image with any rear sight
RBS dual apertures: 3mm for longer eye relief mounting, low light and faster target acquisition and 1.5mm for shorter eye relief mounting and greater accuracy, instantly selectable
