The HM6X is a flip-to-side 6X magnifier designed for use in conjunction with a red dot sight. The HM6X is feature-packed and includes a quick release, ambidextrous, flip-to-side Picatinny rail mount. The 7075-aluminum housing features a removable spacer which provides compatibility with both absolute and lower 1/3 co-witness dot heights for maximum compatibility. The HM6X has a generous 2.55" of eye relief, is IP67 certified water resistant, and includes windage and elevation adjustments for precision alignment with your red dot sight zero. Mfg: Holosun