Russia has been secretly helping Iran develop supersonic cruise missiles under a program codenamed C430L, with Russian officials and engineers traveling to Iran and exchanging technical materials through 2025. The missile development effort was arranged by Russia's state arms exporter, Rosoboronexport, in coordination with the US-sanctioned NPO Mashinostroyenia.

The engineering delegation included key specialists from NPO Mashinostroyenia. Alexander Dergachev, chief designer for sea-launched missiles and cruise missile complexes at the bureau, traveled to Iran as part of the group. Alexander Chebakov, head of NPO Mashinostroyenia’s design department for air-breathing propulsion units, also joined the delegation. Yuri Prokhorchuk, head of the aerodynamics and ballistics department at NPO Mashinostroyenia, traveled to Iran as part of the engineering team.

Timeline

Russian arms export officials and senior NPO Mashinostroyenia engineers traveled to Iran repeatedly in 2023. The C430L program began in 2023. By 2025, NPO Mashinostroyenia had received various Iranian technical materials. In correspondence from April 2025, Rosoboronexport proposed sending a delegation of Russian specialists to Iran and asked Tehran to answer the engineers' questions before the trip.

What's New

In April 2025, Rosoboronexport proposed sending a delegation of 24 Russian specialists to Iran as part of the C430L program, with the mission explicitly tied to the analysis of Iranian flight test data from a ramjet propulsion system. In 2025, the Russian Ministry of Foreign Affairs confirmed that Moscow had supplied Iran with 'technical assistance' in the field of defense, without specifying the nature of the support, during a press briefing with Iranian officials. In 2025, the European Union imposed additional sanctions on Russian entities linked to the C430L program, including NPO Mashinostroyenia, citing their involvement in the transfer of military technology to Iran.

NPO Mashinostroyenia, the Russian rocket design bureau involved in the C430L program, was sanctioned by the United States in 2014 for its role in developing cruise missile systems used by Russia’s strategic nuclear forces. In 2019, Russia and Iran signed a bilateral agreement to enhance military and technical cooperation, which included the exchange of missile technology and joint defense projects. In 2023, Rosoboronexport, the Russian state arms exporter, had a reported annual export revenue of $11.5 billion, with a portion of its business involving military equipment to countries under international sanctions.

Vladimir Putin has publicly endorsed Iran's right to develop its own defense capabilities, stating in a 2023 speech that 'no one has the right to impose their will on others.' The U.S. State Department issued a report indicating that Iran had conducted at least three successful flight tests of its domestically developed ramjet propulsion system, a key component in supersonic cruise missiles.

Why It Matters

The events described span more than a decade, from 2014 to 2025, reflecting a long-standing pattern of military and technical cooperation between Moscow and Tehran. The collaboration occurs within a framework established by a 2019 bilateral agreement to enhance military and technical cooperation, which included the exchange of missile technology and joint defense projects.

The partnership extends beyond technical exchanges to diplomatic solidarity. Iranian President Masoud Pezeshkian and Russian President Vladimir Putin spoke on the sidelines of the Shanghai Cooperation Organisation summit in Bishkek. Pezeshkian thanked Putin for Moscow's position on the war in Iran and resulting sanctions.

He told Pezeshkian that Moscow stood in solidarity with the Iranian people in the fight for their interests. He said that Russia and Iran will maintain their economic and trade relationship despite the current military and political environment.

"During this difficult period, we are striving to provide you with the necessary assistance - as we have discussed - and are supplying you with essential goods," Putin said. Pezeshkian said that together, Moscow and Tehran can resist what he called US "unilateralism." He accused the US of violating international law and committing acts of aggression. He stated that Russia and Iran would find ways to circumvent US sanctions. "Within frameworks like the SCO and other organizations, we can bypass unilateral measures and cooperate on a multilateral basis," Pezeshkian said.