Jim LamsonMasoud PezeshkianNicole GrajewskiFabian HinzNPO MashinostroyeniaRosoboronexport

Russia secretly helped Iran develop supersonic cruise missiles that could target US warships; program codenamed C340L began in 2023

Russia has covertly assisted Iran in developing supersonic cruise missiles capable of threatening U.S. warships, with the program, codenamed C340L, commencing in 2023. This initiative aims to enhance Iran's missile technology, potentially endangering American military assets in the region.

Yahoo Yahoo2 September 2026 · 03:59 UTC
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Russia has secretly aided Iran in developing supersonic cruise missiles that pose a significant threat to U.S. naval forces in the Middle East. The initiative, known as C340L, began in 2023 and aims to enhance Iran's missile capabilities, potentially targeting American aircraft carriers and warships.12

The program focuses on creating a ramjet propulsion system, enabling missiles to exceed the speed of sound. These supersonic cruise missiles are particularly challenging to intercept due to their low-altitude flight paths, reaching speeds of up to 2,200 mph.

While Iran has constructed and tested this propulsion system, there is currently no evidence of its deployment in active combat. The project was orchestrated by Rosoboronexport, Russia's state arms exporter, in collaboration with NPO Mashinostroyenia, a sanctioned Russian rocket firm. By 2025, NPO Mashinostroyenia had received a cache of Iranian technical materials related to the ramjet system.345

Russian engineers have actively engaged in the program, analyzing data from Iranian test flights and providing feedback on performance. This collaboration underscores a broader military partnership, as Iran has supplied Russia with drones for its operations in Ukraine, while Russia has offered intelligence to assist Iran in targeting U.S. bases in the region.

Key Insight
“The program, arranged by Rosoboronexport and NPO Mashinostroyenia, which the US has sanctioned since 2014, involved Iran sharing ramjet propulsion material by 2025. These missiles fly at up to 2,200mph, hugging terrain to evade radar, and Russia has also provided intelligence for strikes on American bases.”
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