Introducing the FAB Defense Flip-Up Sights the perfect addition to your M4 AR-15 or M-16 platforms. These auxiliary sights serve as an impeccable tool for precise shooting and can be effortlessly mounted on any 1913 Picatinny rail. With the unique design of the FBS (Front Back-Up Sight) you gain an exceptional low-profile front sight that guarantees resilience and reliability in any field condition. The innovative angel-wing-shaped front shroud promotes superior image centering with any rear sight providing enhanced targeting and accuracy.FAB Defense Front/Rear Flip-Up Sights - AR-15/M4/M16Low-profile design for stealth operationEasily mounts on 1913 Picatinny railAngel-wing-shaped front shroud for better targetingMoving to the RBS (Rear Back-Up Sight) this accessory is second to none when it comes to versatility and user adaptability. It features dual apertures: a 3mm option for longer eye relief mounting ideal for low light scenarios and faster target acquisition and a 1.5mm aperture for shorter eye relief mounting that results in superior accuracy. These options are instantly selectable allowing you to adapt swiftly to diverse shooting environments. The RBS like the FBS is also ready to be mounted on any 1913 Picatinny rail and serves as an excellent primary or backup sight. The FAB Defense Flip-Up Sights combining the FBS and RBS are not just accessories but necessary equipment to ensure your shots hit the mark every time. Order your Flip-Up sights online today!Need extra magazines for your Glock? Click here to check out our full selection of Glock magazines!Looking for a new Glock? Click here to check out our full selection of Glocks!