High-Performance, Super-Accurate Optic Calibrated For 5.56 NATO Ammunition Fixed 4-power scopes are specifically engineered for 5.56 NATO ammunition to provide shooters with pin-point accuracy from 20 to 800 meters/yards. Rugged, aluminum housing and an integral base that attaches/detaches quickly to MIL-STD 1913 Picatinny rails with a flick of the easy-to-operate throw levers. Knurled, side-mounted dial toggles 5 reticle brightness settings for your choice of center point illumination for close-range targeting, or complete reticle illumination allowing you to use the holdover marks in any light conditions. Glass-etched reticle is always visible and is night-vision compatible. A1 reticle has a “Chevron” center aiming point and holdover hash marks at 400, 500, 600, 700, and 800 meters. C1 reticle is a standard, crosshair-style reticle with a red highlighted center aiming reference, a target-size based rangefinder, and holdover hash marks at 300, 400, 500, 600, 700, and 800 meters.