Holosun Red Dot Magnifier 3X Integrated QD Mount w/Optional Spacer Black. The HM3X is feature-packed and includes a quick release ambidextrous flip-to-side Picatinny rail mount. Holosun includes a spacer with the HM3X that provides compatibility with absolute and lower 1/3 co-witness dot heights for maximum compatibility. The HM3X 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 also includes a built-in flat driver tool for easy adjustments. Specifications for Holosun HM3X 3x Red Dot Sight Magnifier: Manufacturer: Holosun Finish: Aluminum Magnification: 3 x Eye Relief: 2.75 in Length: 3.9 in Weight: 9.8 oz Field of View Linear: 37 ft at 100 yds Field of View Angle: 7 degrees Weather Resistance: Yes Fabric/Material: Aluminum Included Accessories: QD Mount and Spacer Width: 1.6 in Height: 2.4 in Color: Black Operating Temperature: -22 - 140 Fahrenheit Exit Pupil: 0.29 in Diopter Adjustment Range: -3 - 3 dpt Condition: New Water Resistance Level: IP67 Lens Material: Optical Glass Storage Temperature: -40 - 158 Fahrenheit Magnification Type: Fixed Features of Holosun HM3X 3x Red Dot Sight Magnifier: Flip to the Side design Outstanding Specification & Clarity QD Mount and Spacer Included IP67 Certified Compatible with Absolute and Lower 1/3 Height Optics Package Contents: Holosun HM3X 3x Red Dot Sight Magnifier QD Release Mount T10 L Key User Manual Holosun HM3X: HM3XT Red Dot Magnifier 3X Integrated QD Mount w/Optional Spacer Black