FFS - Super low profile front sight features a toolless adjustable center post for elevation surrounded by two guide posts to assist in focusing the operator's eye to the target. - No tool needed for elevation adjustment - Elevation click adjustable from firing position - Super low profile sights are manufactured from polymer and aluminum to reduce weight - Spring loaded push button raises the sights - The push button can be accessed ambidextrously - The rugged flip up mechanism is designed to ensure constant battery action and repeatable zero - Secure mounting to any Picatinny Rail. Square center lug eliminates any movement - Length Closed On Rail: 2.125 - Height Opened: 1.25 - Height Closed: .5 - Width: 1.6 - FRS - The rear sight features three operator selectable apertures including the standard military A2 style double peep aperture with leaf sight aperture. All are click adjustable for windage. - Super low profile sights are manufactured from polymer and aluminum to reduce weight - Spring loaded push button raises the sight - The push button can be ambidextrously accessed - The rugged flip up mechanism is designed to ensure constant battery action and repeatable zero - Secure mounting to any Picatinny rail. Square center lug eliminates any movement - The large aperture is designed to be used for CQB and low light conditions the small aperture for longer range target acquisition - Length Closed On Rail: 2.125 - Height Opened: 1.25 - Height Closed: .5 - Width: 1.6