Vortex

You'll acquire your target quickly with the Crossfire Red Dot Sight from Vortex, an unmagnified aiming device for close-range shooting engagements. Compact and lightweight, the Crossfire features a 2 MOA, daylight-bright red dot that promotes rapid engagement of nearby targets, yet is fine enough to precisely engage targets at a distance. Eleven brightness settings let you customize your sight view to suit the conditions, and the lowest two settings are compatible with night vision gear. The Crossfire Red Dot can be mounted low or as a lower 1/3 co-witness, lending its functionality to AR-15s, shotguns, and pistols. Windage and elevation are adjusted at 1 MOA per click, with an adjustment range of 100 MOA for both. The sight's lenses feature multiple anti-reflective coatings. Eye relief is unlimited. The hard-anodized aluminum housing is O-ring sealed to exclude dust and moisture. The Crossfire Red Dot is 2.5" long and weighs 5.2 ounces.