Burris Optics 300259 Burris Fastfire Iv Multi Ret Mat with instant dot-on-target accuracy for any firearm from handgun to shotgun. A great choice for 3-Gun and wing shooting, and any use from patrol to plinking. Multiple reticle options, massive battery life and 4 different models make FastFire 4 the most versatile red dot reflex you can mount.Features :Toggle Four Different Reticle OptionsLarger sight window for faster target acquisitionLonger battery life - up to 26k hours on medium brightnessBrighter aiming pointOptional screw-on weather shield for a completely enclosed sightAuto-Brightness & Auto-shutoff after 8 hoursLightweight at 1.6 oz