Designed for patrol and tactical operations, the rugged P4Xi scopes offer clear images and a fast-action reticle to tackle every day use or sudden action. The P4Xi 4-16x56 is a medium range scope with 34mm tube, an illuminated front focal plane Special Competition Reticle (SCR(TM)) and side parallax adjustment. SCR Reticle Steiner's Special Competition Reticle (SCR) is a proprietary reticle designed by Steiner for precision shooting use. An extended illumination area lets the shooter engage targets at long distance even in low light. The vertical crosshair features 1/2-mil marks for distance holdover. The horizontal crosshair offers 1/2-mil and 2/10-mil lines for windage hold-off. The windage and elevation knobs are designed for precise adjustment. The dials are calibrated so that 1 click equals 1 cm @ 100 meters or .1 mRAD for the 4-16x. Ruggedly constructed scope tubes are milled from solid, high-grade aluminum stock so there are no welds or seams, for greater strength and durability. Specifications Field of View at 100 yds 27.5-6.9 Eye Relief .5-4.0 Exit Pupil 14-3.50 Length 14.6 in Weight 30 oz Diopter Adjustment Range +2 to -3 Elevation Adjustment Knob .1 mRad Illumination Control Rotary Dial Wind/Elevation Click Value 1cm Elevation Range at 100 m. 30 MIL Wind Range at 100 m. 16 MIL Parallax/Focus Side Focus Parallax/Focus Range 50 yards to infinity Nitrogen Filled Yes Lens Cap No Waterproof/Fogproof Submersible to 33ft Battery CR2032 Warranty Heritage Warranty