High Quality Content by WIKIPEDIA articles! The Mark 82 is an unguided, low-drag general-purpose bomb, part of the U.S. Mark 80 series. It is the most common bomb in the US. With a nominal weight of 500 lb, it is the smallest of those bombs in current service, and one of the most common air-dropped weapons in the world. Although the Mk 82's nominal weight is 500 lb, its actual weight varies considerably depending on its configuration, from 510 lb to 570 lb. It is a streamlined steel casing containing 192 lb of Tritonal high explosive. The Mk 82 is offered with a variety of fin kits, fuzes, and retarders for different purposes.