The Valken Kilo Mini Red Dot Sight is a reflex sight for airsoft guns. The mini reflex sight housing is molded from a glass filled nylon polymer, and mounts to most 20mm picatinny and weaver rails. This airsoft optic includes a CR2032 battery to illuminate the 5 MOA red dot. This optic is great reflex red dot for airsoft pistols or SMGs. We recommend our Valken Sight Protector Kit for use with this red dot sight.