Ukraine Uncovers New Russian S-71K “Kover” Missile Designed for Su-57 Strikes

Ukraine’s military intelligence has disclosed technical details of a new Russian air-launched cruise missile, the S-71K “Kover,” reportedly capable of striking targets at a distance of up to 300 kilometers.

According to Ukraine’s Defense Intelligence (HUR) on April 27, the information was published through the War&Sanctions portal, which includes a 3D model of the missile, its components, and analysis of its electronic systems.

The agency also confirmed that the weapon was developed by Russia’s United Aircraft Corporation (UAC) for deployment from Su-57 fighter jets.

The S-71K was first used by Russian forces in late 2025, according to HUR. Ukrainian intelligence noted that Russia may also seek to integrate the missile into the S-70 “Okhotnik” unmanned combat aerial vehicle in the future.

Technical data released by HUR indicates that the missile uses a combined fuel system with a main tank and two additional side tanks, enabling a projected range of up to 300 kilometers. The warhead consists of a 250-kilogram OFAB-250-270 high-explosive fragmentation aerial bomb integrated into the front section of the missile.

The missile’s structure is built from multilayer composite materials based on fiberglass, reinforced for additional durability, while internal components are made from aluminum alloys. It is powered by an R500 turbojet engine produced by a company identified as part of UAC.

HUR reported that the onboard guidance system includes a flight controller and an inertial navigation system based on relatively simple sensors. At the same time, the majority of the missile’s electronic components originate from foreign manufacturers, including parts sourced from the United States, China, Switzerland, Japan, Germany, Taiwan, and Ireland.

Earlier, HUR declassified details of Russia’s “Izdeliye-30” cruise missile, revealing a range of at least 1,500 km and an 800 kg warhead, according to data published on the War&Sanctions portal on March 2.

The agency reported that while the missile incorporates domestically produced systems, its navigation and guidance components rely heavily on foreign-made electronics sourced from countries including the US, Switzerland, North Korea, and the Netherlands.

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