"The Burris Optics FastFire III Red Dot Reflex Sight is perfect for mounting to favorite handgun, image shotgun or hunting rifle for greater accuracy and faster target acquisition. Compact and lightweight, the Burris Optics FastFire 3 Red Dot Weapon Sight won't affect balance or handling, plus it offers unlimited eye relief, parallax-free 1.07x magnification and incredibly simple operation. This Red Dot Sight by Burris Optics offers upgraded features such as windage and elevation adjustments that don't require any special tools or additional gunsmithing. The Burris Optics FastFire III Tactical Red Dot Sight has a convenient power button with three levels of brightness, an automatic brightness setting and battery access on the top of the sight, making it easier to change the batteries. The Burris Optics FastFire III Red Dot Tactical Rifle Sight is ideally suited for use on pistols and rifles where fast target acquisition is desired and will match up well with carbines, lever guns and shotguns. The Burris Optics FastFire III Red Dot Sight is ruggedly designed, impervious to the elements and will hold up to years of punishing recoil.|Smaller, lighter in weight and more compact than most red dot sights|Strong and durable with a frame made of stainless steel, bronze and anodized aluminum|Can be mounted directly on almost any weapon including on the slide of a semi-automatic pistol|Since eye relief is unlimited, the FastFire can be used on handguns, rifles and shotguns|Low magnification provides an extremely large field-of-view|Multicoating is sandwiched between two highly polished, optical quality glass lenses for protection from scratches and abrasion and a bright, clear sight picture|Light-emitting diode"