The Burris FastFire 2 provides a 4-MOA red dot. Its automatic brightness sensor adjusts to your environment, so you can continue hitting targets. The Burris FastFire 2 reflex type red dot sight has proven to be a terrific fast target acquisition sight for turkey shotguns, deer slug guns, tactical and close range hunting carbines, muzzleloaders, paint ball guns, home defense shotguns and even upland and waterfowl shotguns. The Burris FastFire Red Dot Reflex Sight weighs in at just 2 ounces, fully mounted.