The German-made M5Xi series features world-class engineering and optical systems, built to strict military specs and precisely crafted for victory - on the battlefield, or in competition. The 1-5x is for marksmen rifles, patrol rifles and AR/M4 platforms, with true eyes-open 1x magnification, and 5x zoom to locate targets at longer distances. Close combat scope with 30mm tube, Rapid Dot reticle calibrated in 5.56, true 1x eyes open capability for situational awareness and 5x power to engage distant targets Magnification 1x-5x Tube Diameter 30mm Length 11.6" Battery CR2450 Features 5x Zoom: provides maximum range at the high end, wider field of view at the low end and eliminates any tunneling effect. Broadband Anti-Reflection Coatings: for 94% + light transmission to ensure optimal performance in low light. Optimized Exterior Design: with larger, positive grip elevation, windage, parallax and illumination knobs and nonslip diopter and magnification adjustment. Illuminated Reticle: with seven night and four day levels with two "OFF" positions at each end, and quick standby levels between each for fast return setting. Optimized Tube and Knob Configuration: for more mounting options and optimum performance with different rifles and added equipment. Precise Windage/Elevation Adjustment: is easy and accurate for repeasted accuracy, with tactile click-by-click feedback you can hear and feel. Waterproof/Fogproof: durable construction you can trust to stand up to any cold or wet condition. Waterproof to depths of 33 feet. Shockproof: and rugged enough to withstand impact testing to 900 Gs on all optical and electronic components. Specifications Magnification 1-5x Reticle Rapid Dot 5.56 Field of View at 100 yds 118.1 - 23.7 Eye Relief 3.5 - 4.3 in. Exit Pupil 11.5 -7.2 mm Length 11.6 in. Weight 21.2 oz. Diopter Adjustment Range +2 to - 3 Elevation Adjustment Knob Resettable Zero Illumination Control Rotary Digital Control with Intermediate Stops Wind/Elevation Click Value 1 cm (0.1 mrad) Elevation Range at 100 m. 332 m (32 mils) Wind Range at 100 m. 160 cm (16.0 mils) Parallax/Focus Fixed Parallax/Focus Range 328 ft Nitrogen Filled Yes Operating Temperature Range -13Adeg F to +145Adeg F Lens Cap Yes Waterproof/Fogproof Submersible to 33 ft. Battery CR 2450 Warranty Heritage