Flip Up Sight Won't Take Up Too Much Space or Interfere Other Accessories When it's Flipped Up Rapid Transition Both Left and Right Handers Could Use These Sights Adajustable Windage and Elevation Dual Aperture Windage Adajustment Rear Sight Level 3 Mil Spec Hard Anodization Front Sight A2 post elevation adjustment Rear Sight Dual Aperture Windage Adjustment Designed for Close Quarter Battle Flip-Up Design：Simply press a button and pop up your sights quickly. For quick transition between iron sights and scopes. Fully adjustable for Windage. Both Precision and CQB apertures on rear sight with standard front sight, help to zero better in medium and short distance. Ultralight!!!! MADE of Polyphenylene sulfide is a semicrystalline material.