The General Purpose bombs are a family of free fall, "dumb" ordnance used by the U.S military. The primary weapons effects are due to blast and fragmentation. These bombs are manufactured in a variety of sizes and weights and can be fitted with various tail kits and guidance systems, making them "smart" weapons.
The Mk 82 is a streamlined steel bomb casing containing Tritonal high explosive. When loaded with PBXN-109 thermally insensitive explosives, the bomb is designated BLU-111/B. The Mk 82 and BLU-111/B are used with the GBU-12 Paveway laser guided bombs and the GBU-38 JDAM.
The Mk 83 is a streamlined steel bomb casing containing Tritonal high explosive. When filled with PBXN-109 thermally insensitive explosives, the bomb is designated BLU-110. The BLU-110B/B is a 1,000-pound class general purpose bomb. It has a relatively thin bomb case that is streamlined to reduce aerodynamic drag. The bomb produces blast and fragmentation effects and can be used as either an unguided, high or low drag weapon. The Mk 83/BLU-110B/B warhead is used with the GBU-16 Paveway II laser guided bombs and the GBU-32 JDAM. The BLU-110B/B can also be fuzed with proximity, instantaneous or delayed fuzes to provide a variety of military effects.
The BLU-109 is a hard target penetrator bomb. It is a penetration weapon used against bunkers, aircraft shelters, and reinforced concrete structures. The warhead is used on the GBU-10/24/27 Paveway weapon system as well as GBU-31 Joint Direct Attack Munition (JDAM) weapon systems, as well as on the GBU-15 electro-optically guided bomb and the AGM-130 rocket-boosted weapon.