Dark Earth / Tan Superior Tactical Flip up Front and Rear Iron Sights Set - FDE Square Shaped A2 Type Mil Spec Aluminum Premium Front and Rear Sights Set Constructed of 6061 Aircraft Grade Aluminum Calibrated and matched together as a set, Very well made sights Rear Sight: Windage Adjustable features same MOA adjustment as standard sight Front Sight: A2 post elevation adjustment