Boeing delivered the 500th Focused Lethality Munition (FLM) to the US Air Force (USAF) in December 2013, completing its current contract for the low collateral damage weapon. All were delivered on time and on cost, said the company.
FLM is a derivative of the GBU-39/B Small Diameter Bomb, and uses the same combination of inertial and GPS satnav guidance. Its warhead was developed by Lawrence Livermore National Laboratory and the USAF Research Laboratory. A multiphase-blast MNX-1209 (MBX) dense inert metal explosive (DIME) fill is contained within a carbon-fibre composite case, a combination intended to minimise fragmentation.
Developed under a Joint Capability Technology Demonstration (JCTD) programme sponsored by the Office of the Secretary of Defense (OSD), the FLM completed JCTD testing in December 2007.