Wilson Combat QDS Flip Up Sight System features a spring loaded deployment system that automatically flips the sight up at the push of a button. Front and rear sights lock positively in the folded and deployed positions and are precision machined from high strength but lightweight aircraft aluminum and hard anodized to military specifications. Easy, 1-minute installation on any AR with a railed handguard. Small and Large aperture are on the same plane for simple sight adjustment in the field.Front sight tower has standard A-2 style wingsFront sight is standard handguard heightRear sight has a dual peep (A2 style) aperture on same planeFront sight folded height: .435"Rear sight folded height: .435"Easy, one minute installationSights positively lock in closed and open positionMade in USAFAQ's for QDS Sights:Each front sight notch adjustment will move bulllet elevation impact 1" at 100 yards.Each click on the rear sight will move bullet windage impact 1/2" at 100 yards.