Russia is reportedly providing secret assistance to Iran in the development of supersonic cruise missiles, marking a significant transfer of military technology between the two nations. The program, codenamed C43OL, has enlisted Russian missile experts to aid Tehran in creating a new class of weapon designed to pose a threat to U.S. aircraft carriers in the Middle East.
According to an investigation by the Financial Times, the primary objective of C43OL is to help Iran develop a ramjet propulsion system. This technology enables cruise missiles to sustain speeds multiple times the speed of sound, making them exceptionally difficult to intercept due to their low altitude and high velocity, reportedly up to 2,200 miles per hour.
"For the Iranians, this would give them a qualitatively new strategic weapon system that could threaten US navy vessels," stated Jim Lamson, a former CIA military analyst.
While Iran has successfully built and tested the ramjet propulsion system, there is no current evidence of its deployment. Fabian Hinz, an expert on Iranian missiles, described the transfer as a "highly strategically sensitive military technology" that Iran has sought for decades, adding that such a program would necessitate high-level political approval in Russia.
The clandestine assistance program was facilitated by Russia's state arms exporter, Rosoboronexport, in coordination with the state-owned rocket designer NPO Mashinostroyenia. NPO Mashinostroyenia was previously sanctioned by the U.S. in 2014 for its development of cruise missile systems.
Leaked travel records indicate that Russian arms export officials and NPO Mashinostroyenia engineers made multiple trips to Iran before the C43OL contract was finalized in November 2023. By 2025, NPO Mashinostroyenia had reportedly received substantial Iranian technical materials related to ramjet propulsion.
This development occurs amidst heightened tensions and ongoing military exchanges between the U.S. and Iran. Russian President Vladimir Putin recently told his Iranian counterpart, Masoud Pezeshkian, that Moscow was committed to providing necessary assistance during Iran's conflict with Israel and the U.S.
The U.S. has been conducting strikes against military targets in Iran, with Tehran responding by firing missiles and drones at various regional sites. U.S. Central Command confirmed a recent barrage of attacks on Iranian military targets, including air defense sites and radar systems. These strikes followed a period of reduced military action and have raised concerns about escalating regional conflict.
In response to the U.S. strikes, Iran launched ballistic missiles toward Jordan. The Iranian Revolutionary Guard claimed to have targeted a U.S. base near the Gulf of Aqaba, though Jordan's military reported shooting down most of the projectiles. President Donald Trump commented on the situation, indicating that the U.S. would continue to strike Iranian radars if retaliation occurred.
Iran has also been supplying Russia with drones for use in Ukraine, while Russia has reportedly provided intelligence to Iran for targeting American bases in the Middle East. According to Nicole Grajewski, a professor at Sciences Po University, the ramjet program suggests Russia's intent to broaden the scope of the Ukraine war and draw the U.S. into additional theaters.