The Burris Fastfire Red Dot Sight Mount drastically increases accuracy and speed. You'll find that even aiming your firearm is easier with this accessory. The design simplifies your aim, removing the need to align rear and front sight along with the target. This is the only waterproof unit available in its category. The design is lightweight yet tough, able to be put to use on semi-autos, shotguns, high-powered rifles, and slug guns. The housing is made of extremely durable metal.