Mk 84

Mk 84 is a standard 2,000-pound class general-purpose bomb in the inventory of the United States Armed Forces and numerous allied nations. As the largest variant in the Mark 80 series of unguided, low-drag bombs, it forms a cornerstone of aerial bombardment capabilities. Its design allows for deployment from a wide array of aircraft, including the F-15E Strike Eagle, F-16 Fighting Falcon, F/A-18 Hornet, and B-52 Stratofortress. The weapon's significant blast and fragmentation effects make it a primary choice for destroying hardened structures, industrial facilities, and area targets.

Description and specifications

The Mk 84 is a streamlined, low-drag bomb body constructed from welded steel, designed to fall with stability and accuracy from high-speed, low-altitude delivery aircraft. Its primary explosive fill is typically either Tritonal or H6, though newer production may use the PBXN-109 insensitive munition compound. The bomb is configured with a single suspension lug, standardized for MIL-STD-1760 smart-weapon interfaces, allowing it to be carried on most modern hardpoints. For detonation, it can employ a variety of fuzes, with the programmable FMU-139 being common for precise airburst or delay functions, while simpler mechanical fuzes like the FMU-143 are also used. The complete weapon, with fuze and tail fin kit, measures approximately 3.3 meters in length and 0.46 meters in diameter.

Development and history

The Mk 84 was developed in the 1950s as part of a comprehensive modernization of United States air-delivered munitions, which produced the Mark 80 series to replace older, less aerodynamic World War II-era bombs. This program was driven by the United States Air Force and the United States Navy to create weapons compatible with the new generation of jet aircraft entering service, such as the F-4 Phantom II. The design emphasized reduced drag for carriage on supersonic platforms and improved ballistic characteristics. Throughout the Cold War, it became a ubiquitous weapon in the NATO arsenal, with production licensed to allied nations. Its basic design has proven enduring, serving as the warhead section for numerous guided bombs, including the GBU-10 Paveway II, GBU-15, GBU-24 Paveway III, and the Joint Direct Attack Munition.

Operational use

The Mk 84 has seen extensive combat use in virtually every major conflict involving the United States since the Vietnam War. It was employed in large numbers during Operation Linebacker II and later conflicts such as Operation Desert Storm, where it was used to destroy Iraqi command bunkers, aircraft shelters, and infrastructure. During the NATO bombing of Yugoslavia and operations in Afghanistan and Iraq, it remained a primary weapon for striking fortified positions and cave complexes. The bomb is often used with laser-guided bomb kits or GPS guidance kits like the JDAM, transforming it into a precision-guided munition, but it remains highly effective in its unguided, "dumb" form for area saturation. Its use by the Israeli Air Force and other allied air arms is also well-documented in various regional conflicts.

Variants

Several key variants and derivatives of the basic Mk 84 bomb body exist. The BLU-109/B is a penetration variant with a thick, forged steel case designed to piernce hardened concrete targets before detonating. The GBU-10 Paveway II and GBU-24 Paveway III are laser-guided bombs that integrate the Mk 84 warhead with seeker heads and control fins. The GBU-15 is a modular, stand-off glide weapon that can use the Mk 84. The most significant modern variant is the GBU-31 Joint Direct Attack Munition, which attaches a GPS/INS guidance kit to the bomb. Inert training versions, designated as BDU-45 or BDU-50, are filled with concrete or plaster and used for practice. The BLU-117 is another general-purpose bomb designation sometimes applied to Mk 84 production.

See also

* Mark 80 series * GBU-12 Paveway II * BLU-82 * MOAB * Mark 77 bomb * Aerial bomb * List of U.S. Navy weapons

Category:Aerial bombs of the United States Category:Cold War aerial bombs Category:General-purpose bombs