LEUPOLD. Mark 3HD 1.5-4x20 • Illum. FireDot BDC Reticle • Second Focal Plane • 30mm • O.1 MIL Finger Click Windage With LIGHTWEIGHT AIRCRAFT-GRADE ALUMINUM FITS PICATINNY STYLE RAILS IDEAL SIGHT HEIGHT AND EYE RELIEF FOR AR PLATFORMS TORX SCREWS FOR ROCK SOLID ATTACHMENT