FAB Defense Front and Rear Folding Back-Up Sights AR-15 Black Polymer Accessory

FAB Defense’s Front and Rear Folding Back-Up Sights set includes both FBS and RBS components designed for AR-15, M4, and M-16 platforms. The front sight features low-profile, durable construction and mounts directly to any 1913 Picatinny rail. Its ergonomic angel-wing-shaped front shroud centers the image with any rear sight, and it functions equally well as a primary or back-up sight. The rear sight likewise offers low-profile, durable construction and 1913 Picatinny rail compatibility across M4/AR-15/M-16 platforms. It incorporates dual apertures: a 3mm aperture for longer eye relief mounting, low light conditions, and faster target acquisition, plus a 1.5mm aperture for shorter eye relief mounting and greater accuracy—both instantly selectable to suit your shooting conditions. The ergonomic angel-wing-shaped front shroud helps center the image with any front sight, and the rear sight serves as either a primary or back-up sight option.