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.Everything you loved about the Burris FastFire 3 plus...Toggle between 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