For your avid shooters, who like to be out on the range, the Sightmark Core Shot A-Spec FMF Reflex Sight, stimulates precision accuracy and reliability in high-stakes competition shooting and hunts of a lifetime. Designed to deliver elite optic performance, A-Spec FMS Reflex Sight guarantees precision for all recreational, professional and competitive environments. The Core Shot bridges the gap between the Mini Shot and Ultra Shot for all customers wanting a compact sight. It is made out of aircraft grade 6061-T6 aluminum, for a dependable compact lightweight housing. The sight includes windage and elevation click adjustments to dial in quickly and an external battery compartment for easier access to the battery. Includes a riser mount to work effectively on AR's. Features: Compact, lightweight aluminum alloy housing Protective aluminum shield Fixed Picatinny mount Wide lens provides quick target acquisition Slotted windage and elevation adjustments Red reticle illumination 10 yd infinity parallax setting Unlimited eye relief Off, 0 - 8 NV 1 - 2 reticle brightness setting IP55 water resistant 4 feet shockproof 20 to 1400 hr battery life