US Military Bunker Buster’s In Action

The GBU-28 laser guided bomb was developed, built, tested, and used in combat in a 17 day period. The deepest Iraqi bunkers were secure from the best penetrating bomb, the GBU-24A/B, with the I-2000 warhead. Coalition leaders required the capability to destroy these vital command and control facilities. Texas Instruments and Lockheed combined their efforts to build the 18 ft long bomb. TI adapted the seeker from the GBU-24 and Lockheed built the bomb body from discarded eight inch howitzer barrels. The Air Force initially contracted for 30 bombs but the cease fire started after only two were employed. Two more of the bombs were used in testing before the bombs were dropped in combat and the Air Force expended two or three more in additional tests after the war. The Air Force ordered an additional 100 GBU-28s with the BLU-113 (8 inch gun barrel) bomb body and stocks remained low due to the limited number of targets and the only fighter capable of employing it initially was the F-111F. Read the full description over at

Mission Offensive counter air, close air support, interdiction
Targets Fixed hard
Class 4,000 lb. Penetrator, Blast/Fragmentation
Service Air Force
Contractor Lockheed (BLU-113/B), National Forge (BLU-113A/B),
Program status Production
First capability 1991
Weight (lbs.) 4,414
Length (in.) 153
Diameter (in.) 14.5
Explosive 6471bs. Tritonal
Fuze FMU-143 Series
Stabilizer Air Foil Group (Fins)
Guidance method Laser (man-in-the-loop)
Range Greater than 5 nautical miles
Development cost Development cost is not applicable to this munition.
Production cost $18.2 million
Total cost $18.2 million
Acquisition unit cost $145,600
Production unit cost $145,600
Quantity 125 plus additional production
Platforms F-15E, F-111F

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