FFS Folding Flip Up Front Sight The front sight features an adjustable center post for elevation surrounded by two guide posts to assist in focusing the operator’s eye to the target. Super low profile sights. Manufactured from polymer and aluminum to reduce weight. Ambidextrous spring loaded push button to raise the sights. The rugged flip up mechanism ensures getting into battery repeatedly. Rigid Picatinny mount, eliminates any wobbling. Center Post adjustment locks at quarter turns with a spring locked pin.