The T5Xi 1-5x24 is designed as a close-combat scope. It features a 30 mm tube, 3-Gun Tactical Reticle(TM) (3TR) calibrated in 5.56 or 7.62, with true 1x eyes-open capability for situational awareness and 5x power to engage distant targets. Select model 5101 for 5.56 rounds, or 5102 for 7.62 rounds.Features Magnification 1x-5x 3TR reticle Tube Diameter 30 mm Length 11.3" Battery CR 2450 One-Piece 30mm Tube increases strength and reliability and provides greater elevation and windage adjustments for longer ranges. Tapered, All Metal Magnification Ring is angled so the shooter can see his magnification setting while positioned directly behind the scope. Locking Dioptor that prevents accidental rotation of the diopter. Consistent Eye Relief and a generous eye box throughout the magnification range eliminates the need to reposition your eye when changing magnification. Throw Lever / Lens Covers that allow quick, easy magnification changes and Tenebraex covers protect the lenses from dust and moisture. Specifications: Field of View at 100 yds 108-21 Eye Relief 3.5-4.3 Exit Pupil 11-4.8 Length 11.3" Weight 19.4 Diopter Adjustment Range +2 to -3 Elevation Adjustment Knob Resettable Zero Illumination Control Illuminated Reticle with 4-day/7-day levels Wind/Elevation Click Value 1 cm (0.1 mrad) Elevation Range at 100 m. 300 cm (30 mils) Wind Range at 100 m. 300 cm (30 mils) Parallax/Focus Fixed Parallax/Focus Range 100 yd Nitrogen Filled Yes Operating Temperature Range -13Adeg F to +145Adeg F Lens Cap Yes Waterproof/Fogproof Submersible to 33 ft Battery CR 2450 Special Features Resettable turrets, 2nd rotation indicator, locking diopter Warranty Heritage(TM) Warranty