Bought this for one of my rifles and now it's just sitting around. selling to fund SBR build. have original box and owners manual. $50- pm for details. From Midwayusa: The Sightmark Tactical Magnifier is a multifunctional accessory inspired by military and law enforcement applications. The 5x Tactical Magnifier is designed for use in conjunction with holographic, collimated reflex, and other compatible weapon sights. The magnifier increases the magnification of the accompanying sight for greater sighting range and improves target recognition, especially at medium range distances. The 5x Tactical Magnifier also features a wide field of view, which allows for superior target acquisition, and high quality multicoated optics for precision accuracy and clarity. similar to eotech g33.