DLP Tactical SCAR Mk17 0-600m Metal Folding Rear BUIS Iron Sight FN SCAR Mk16 / Mk17 style flip up rear iron sight Constructed of Forged T-6061 Aluminum Alloy 0-600m aperture, xlick adjustable windage and elevation adjustment without tools Mounts to any standard Picatinny rail, height aligns with most AR height front sight towers Proudly made by DLP Tactical