A super- versatile sighting source that goes right on your picatinney rail, with quick detach lever if desired. It is nice and compact, with an overall width of 2.8" at the widest point, 1.7" tall total, an overall length of 3.8", and it only weighs 7 1/2 ounces. A high-quality piece with light wear on some of the edges and corners, so come on in to the store here to buy; bring cash.