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Media/Public Contact: T_Outreach_PM@state.gov
Transmittal No. 25-66
WASHINGTON, September 15, 2025 - The State Department has made a determination approving a possible Foreign Military Sale to the Government of Belgium of AIM-9X Sidewinder Missiles and related equipment for an estimated cost of $567.8 million. The Defense Security Cooperation Agency delivered the required certification notifying Congress of this possible sale today.
The Government of Belgium has requested to buy up to the following quantities: three hundred twenty (320) AIM-9X Block II Sidewinder tactical missiles; two hundred fifty-eight (258) AIM-9X Block II+ Sidewinder tactical missiles; fifty (50) AIM-9X Block II tactical guidance units; and thirty (30) AIM-9X Block II+ tactical guidance units. The following non-Major Defense Equipment items will also be included: missile containers; weapon software; transportation; U.S. Government and contractor engineering, technical, and logistical support services; and other related elements of logistics and program support. The estimated total cost is $567.8 million.
This proposed sale will support the foreign policy and national security objectives of the United States by improving the security of a NATO Ally that is a force for political stability and economic progress in Europe.
The proposed sale will improve Belgium’s capability to meet current and future threats by providing air-to-air missiles and guidance units for Belgium’s F-35 fleet in support of NATO’s defense mission. Belgium will have no difficulty absorbing these weapons into its armed forces.
The proposed sale of this equipment and support will not alter the basic military balance in the region.
The principal contractor will be RTX Corporation, located in Arlington, VA. At this time, the U.S. Government is not aware of any offset agreement proposed in connection with this potential sale. Any offset agreement will be defined in negotiations between the purchaser and the contractor.
Implementation of the proposed sale will require the assignment of four U.S. Government and two contractor representatives to Belgium on a temporary basis in conjunction with program technical oversight and support requirements.
There will be no adverse impact on U.S. defense readiness as a result of this proposed sale.
The description and dollar value are for the highest estimated quantity and dollar value based on initial requirements. Actual dollar value will be lower depending on final requirements, budget authority, and signed sales agreement(s), if and when concluded.
All questions regarding this proposed Foreign Military Sale should be directed to the State Department's Under Secretary of State for Arms Control and International Security, Political-Military Affairs Outreach, at T_Outreach_PM@state.gov.