Extremely compact and lightweight, yet rugged, red dot sight provides fast, accurate, both-eyes-open sighting on handguns, rifles, and tactical shotguns. Stainless steel and aluminum housing built to handle the recoil of magnum shotgun loads and installed weight under 2 ounces allow mounting on a semi-auto pistol slide. The FastFire II adds to the original FastFire’s platform a gasket bottom plate that seals it 100% against water; sight will continue to function even after being submerged. The FastFire system’s panoramic field of view and unlimited eye relief simplify shooting with an unobstructed view of the area around the target for fast target acquisition and precise shot Mfg: Burris SPECS: Steel, aluminum, optic-grade glass. 1¾” (4.5cm) long, 1” (2.5cm) wide, 1” high. Includes snap-on cover, CR 2032 lithium battery, windage/elevation scale disc and adjustment tool, instructions. Fits any mount that accepts original FastFire sight.