Dot-on-target accuracy for any firearm from handgun to shotgun, from 3-Gun to wing shooting, from patrol to plinking. Loads of reticle options and massive battery life make FastFireTM the most versatile Red Dot Reflex Optic you can mount. The new FastFire 4 offers 4 separate reticles to toggle through, each with a brighter aiming point than ever before. An automatic brightness sensor means no fumbling with controls under duress. And…it's all backed by Burris's No-Questions-Asked Forever Warranty.