Machined from lightweight, extremely durable, 7075 aluminum, Mil-Spec hard anodized * Same height above bore as standard-issue M4 / M16A4 sights * ½ MOA elevation and windage adjustments * Ambidextrous sights easily and securely mount to Picatinny rails using a flathead screwdriver * Low-profile sights extend only .2" above top rail, don"t interfere with primary optics or military IR illuminator /laser sight