GBU-28

The GBU-28 is a 4,000-pound (1814.3 kg) class laser-guided "bunker busting" bomb produced originally by the Watervliet Arsenal, Watervliet, New York. It was designed, manufactured, and deployed in less than three weeks due to an urgent need during Operation Desert Storm to penetrate hardened Iraqi command centers located deep underground. Only two of the weapons were dropped in Desert Storm, both by F-111Fs. One GBU-28 was dropped during Operation Iraqi Freedom.

Guided Bomb Unit‐28 (GBU‐28)
TypeLaser-guided bunker busting bomb
Place of originUnited States
Service history
In serviceSince 1991
Used by
  • United States
  • Israel
  • South Korea
  • Another undisclosed country
WarsGulf War
Production history
Manufacturer
Specifications
Mass4,000 lb (1,814.3 kg)
Length
  • 19 ft 1.3 in (5.824 m) overall
  • 13 ft 3 in (4.04 m) bomb body
Diameter
  • 15 in (382 mm) main body
  • 16 in (407 mm) widest point
FillingTritonal, AFX‐757 IM
Filling weight675 lb (306.2 kg)
Detonation
mechanism
Impact, time delay
ReferencesJanes

The Enhanced GBU-28 augments the laser-guidance with inertial navigation and GPS guidance systems.

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