U.S. Marines handle an AIM-120 AMRAAM air-to-air missile

U.S. Marines lower an AIM-120 AMRAAM air-to-air missile into a shipping container, U.S. Central Command area of responsibility, 2 May 2026. U.S. Marine Corps photo / DVIDS (public domain). Illustrative; not the specific rounds in this sale.

United States Approves $292 Million AIM-120C-8 AMRAAM Sale to South Korea

By Steve Sawyers MIExpE VR · Defence Analyst & WOME Consultant

Source: US State Department / The Defense Post | Date: 11 June 2026 | Classification: Open Source, AI-Assisted Technical Assessment

FOREIGN MILITARY SALESAIR-TO-AIR MISSILESINDO-PACIFIC

Technical Summary

The US State Department has approved a potential Foreign Military Sale (FMS) to the Republic of Korea of 70 AIM-120C-8 Advanced Medium Range Air-to-Air Missiles (AMRAAM) and two spare guidance sections, with an estimated value of 292 million US dollars. The package, notified to Congress through the Bureau of Political-Military Affairs on 11 June 2026, also includes missile containers, spare and repair parts, and logistics and programme support. RTX Corporation is the principal contractor. The stated purpose is to strengthen the Republic of Korea Air Force air defence capability and preserve interoperability with United States forces on the peninsula.

The AIM-120C-8 is the current-production export designation of the AMRAAM family, built around the Form, Fit, Function Refresh (F3R) of the guidance section that also underpins the US AIM-120D-3. The all-up round combines an active radar seeker with inertial mid-course guidance and two-way datalink, a WPU-16/B solid-propellant rocket motor using reduced-smoke propellant, and a blast-fragmentation warhead in the 18 to 20 kg class initiated by an active radio-frequency proximity target detection device with contact backup (open-source figures; official warhead mass and Net Explosive Quantity, NEQ, are not published). The missile is compatible with the F-35A Lightning II in internal carriage and with the F-15K Slam Eagle, both operated by Seoul.

The request covers 70 AIM-120C-8 missiles and two spare guidance sections for an estimated 292 million US dollars, four days after Washington cleared a separate 106 million US dollar Joint Direct Attack Munition package for Seoul. US State Department FMS notification, 11 June 2026

Analysis of Effects

Seventy rounds is a modest but operationally meaningful replenishment for a two-squadron-plus F-35A fleet. At a notified average of roughly 4.2 million US dollars per missile inclusive of support (a programme-level figure, not a unit flyaway price), the package is consistent with recent AMRAAM FMS pricing to Indo-Pacific customers. The C-8 configuration brings the export baseline to effective parity with the US AIM-120D-3 in guidance hardware, with kinematic performance in the class of the AIM-120C-7 it replaces; published range figures for the family vary widely between sources and are not stated here.

The approval follows a 106 million US dollar Joint Direct Attack Munition (JDAM) clearance for South Korea on 8 June 2026, indicating a deliberate sequencing of air-to-air and air-to-ground weapon stock rebuilds. Regionally, the AIM-120C-8 is already under order or in service with Japan and Singapore, simplifying combined air operations, common test equipment, and potential pooled sustainment across US allies in Northeast and Southeast Asia.

Personnel and Safety Considerations

For storage and transport planning, complete AMRAAM all-up rounds are typically assigned Hazard Division (HD) 1.1 with Compatibility Group (CG) E in their packaged configuration, although the controlling assignment for this delivery will be set by the US Department of Defense hazard classification listing and the Republic of Korea national competent authority; the applicable listing is recorded as a DATA GAP. The active radar seeker and radio-frequency proximity fuze impose electromagnetic radiation hazard (RADHAZ) separation requirements during loading and ground handling. Reduced-smoke solid propellant motors remain a mass-fire contributor in aggregated storage, and quantity-distance siting for the receiving installations should account for the additional NEQ alongside existing JDAM and precision-guided munition inventories arriving under parallel packages.

Data Gaps

Open sources do not disclose: the official warhead designation, fill, and NEQ for the AIM-120C-8 as delivered; the formal hazard classification assignment for the packaged configuration; the delivery schedule and production lot allocation; whether the rounds are new-build or remanufactured guidance-section upgrades; and the split of the 292 million US dollar value between hardware and support services. Confidence in the package contents and value is high (primary government notification); confidence in warhead and energetics parameters is moderate, resting on widely cited but unofficial figures.

ISC Commentary

The notification is small by FMS standards but sits inside a clear pattern: Washington is methodically topping up allied weapon stocks across the Indo-Pacific while AMRAAM production remains heavily subscribed by European replenishment and NASAMS ground-launch demand. Seventy rounds for Seoul is as much an industrial allocation decision as a capability one.

The C-8 designation deserves attention from anyone tracking configuration management. The F3R refresh consolidated obsolete circuit cards across the US and export fleets, which means the same guidance section now flows to domestic D-3 and export C-8 lines. That common backbone is good for production rate, but it also makes AMRAAM output a single shared queue in which every FMS customer competes with US services for the same hardware.

For ammunition storage professionals in theatre, the quiet story is cumulative NEQ growth at Korean air bases. JDAM tail kits arrive inert, but their paired warheads, AMRAAM rounds, and existing stocks all aggregate within the same explosive storage licences, and successive small packages have a way of consuming siting margin without any single notification triggering review.

References

Source-evaluated under NATO STANAG 2022 (Reliability A–F / Accuracy 1–6). Tier 1 = government primary source; Tier 2 = quality news / specialist defence media; Tier 3 = authoritative aggregator / encyclopaedia.

T1US State Department, Bureau of Political-Military Affairs – Republic of Korea: AIM-120C-8 Advanced Medium Range Air-to-Air Missiles, June 2026. (Reliability A / Accuracy 1)
T2The Defense Post – US OKs $292M AMRAAM Missile Sale to South Korea, 11 June 2026. (Reliability B / Accuracy 2)
T2The Defense Post – US Clears JDAM Package for South Korea, 8 June 2026. (Reliability B / Accuracy 2)
T2The Defense Post – Boeing Advances South Korea F-15K Slam Eagle Upgrade, 2 February 2026. (Reliability B / Accuracy 2)
T3The Defense Post – The Silent Hunter: Ultimate Guide to the AMRAAM Missile, 1 July 2025. (Reliability B / Accuracy 3)

Corrections & updates welcome. If you hold open-source data that refines or corrects any parameter in this article, please contact [email protected] citing the specific claim and your source. Verified corrections will be incorporated and credited in the revision history. AI-assisted technical assessment based on open-source material. Not a formal intelligence product.