The BLU-109/B has a steel casing about 1 inch (25 mm) thick. Its warhead is filled with 550 pounds (250 kg) of tritonal.[3] It has a mechanical-electrical delayed-action FMU-143 tail-fuze.[4]
The BLU-118 is reportedly a thermobaric explosive filler variation on the BLU-109 casing and basic bomb design.[6] It contains PBXIH-135, a traditional explosive.[7]
In 2015 General Dynamics started a $7.2 million development of a version called HAMMER, which is intended to destroy chemical and biological substances by spreading dozens of Kinetic Fireballs Incendiaries (KFI) (not explosions) inside a bunker. The KFIs evolved out of the earlier Small Business Innovation Research (SBIR) program by Exquadrum, Inc. of Adelanto, California.[8]
Operators
The BLU-109 has been sold to key US allies including South Korea, Israel, Greece, Saudi Arabia, UAE, Pakistan, and Turkey[9][10]
In late 2023, the United States delivered 100 BLU-109 bombs to Israel.[11] Israeli F-15I fighter jets are believed to have used BLU-109s with JDAM guidance kits in the strikes that killed Hezbollah leader Hassan Nasrallah in Beirut on 27 September 2024.[12][13]