FAB Defense FBS Front Backup Sight

FBS is an advanced low-profile durable auxiliary front sight. It can be used with any rear sight” but has been designed to provide an extreme optical advantage when paired with the FAB Defense(R) RBS Rear Back-up Sight. Sight pin elevation is easily and quickly adjusted without tools. FBS is readily mounted on any 1913 Picatinny rail” making it ideal for use on M4 / AR-15 / M-16 platforms and on the FAB Defense(R) KPOS.