The Firefield Impact Duo Reflex Sight delivers heavy-hitting close quarters performance for MSR rifles and shotguns. Ideal for both target shooting and close- to mid-range hunting scenarios, the Impact Duo features multiple reticles, customizable by the shooters preference.The Firefield Impact Reflex Sights are also customizable with multiple reticles- 4 Pattern- 5 MOA dot, 3 MOA dot with 50 MOA circle, 3 MOA dot with 50 MOA crosshair, 3 MOA dot with 30 MOA circle/crosshair and a visible red Class IIIA laser with a 1″ @ 50 yds dot. The Duo adds a built-in red laser on the side of the sight, increasing target acquisition at close distances and allowing for precision shot placement. Digital switch brightness controls make adjustments quick and easy while an aluminum/polymer construction help with the Impacts IP55 water resistant rating. Shockproof and with a maximum recoil rating of .308, the sight is powered by a single CR2 battery with 75-9000 hours of battery life. The Impact Duo is parallax corrected and delivers unlimited eye relief, making it the ideal optic for both-eyes-open, close range shooting.