Washington has approved a potential Foreign Military Sales deal worth $111.8 million to supply South Korea with 624 GBU-39B Small Diameter Bombs, expanding the nation’s high-precision strike arsenal at a time of rising Indo-Pacific tensions and deeper joint-operations requirements.
According to the Defense Security Cooperation Agency, this request supplements an earlier order that stayed below congressional reporting limits. When combined with previously contracted quantities, South Korea’s planned total exceeds 1,000 rounds. Defense officials in Seoul said the upgrade ensures continued compatibility with U.S. systems and provides planners enhanced options for long-range strike missions.
The GBU-39/B SDB is a compact, 113-kg precision weapon in the 250-pound category, guided by GPS and inertial navigation to strike targets in all weather conditions, day or night. Developed in response to a late-1990s call for a miniaturized multi-carriage munition, the program accelerated in 2001, with Boeing selected in 2003 and operational service beginning in 2006. Its architecture allows four SDBs to be mounted on a single hardpoint using a Bomb Rack Unit, increasing load capacity without compromising flight performance. With a per-unit cost near $40,000, the bomb remains cost-efficient for mass acquisition.
