The Compact Green Dot (DGAB) reflex sight has automatic brightness control and on/off capability using the provided cover. The green dot is easily visible making it ideal for any lighting or weather conditions. It has an integrated mounting base that fits virtually any weaver/picatinny rail and is for use in rifles, pistols and shotguns. It is factory designed to be parallax-free 40 yards and beyond. The DGAB comes with a hard shell lens cover.