The HM3X-FDE is an aluminum bodied 3X magnifier designed for use in conjunction with a red dot sight. The HM3X-FDE is feature-packed and includes a quick release, ambidextrous, flip-to-side Picatinny rail mount. Holosun includes a spacer with the HM3X-FDE that provides compatibility with absolute and lower 1/3 co-witness dot heights for maximum compatibility. The HM3X-FDE has a generous 2.75” of eye relief, is IP67 certified water resistant, and includes windage and elevation adjustment for precision zeroing to your optic's zero. The HM3X-FDE also includes a built-in flat driver tool for easy adjustments.