Burris FastFire II Red Dot Reflex Sight Without Mount 4 MOA Dot Reticle Matte Black

4-MOA dot size. Bright-red dot allows for fast target acquisition and easy aiming. 1x magnification allows both-eyes-open shooting. Parallax-free. Mounts to handguns, rifles and shotguns using Burris mounting systems. Automatic brightness sensor adjusts brightness to match the environmental conditions. Windage and elevation adjustments. High-grade optical glass. Index-matched, Hi-Lume multicoating. Waterproof and shockproof. CR2032 battery included.