Russia will apparently use surplus UR-100UTTKh (NATO: SS-19 Stiletto) and the RS-28 Sarmat liquid-fueled intercontinental ballistic missiles (ICBMs) as the launch vehicle for its Avangard hypersonic boost-glide weapon.

The new weapons will initially be deployed onboard UR-100UTTKn missiles that were returned from Ukraine after the 1991 collapse of the Soviet Union. Once the Sarmat is ready for operations, the Avangard will be deployed on that 200-ton missile also.

“In the early 2000s, about 30 UR-100N UTTKh liquid-propellant missiles were delivered from Ukraine for the ‘gas debt,’” a Russian defense industry source told the Moscow-based TASS news agency. “After the disintegration of the USSR, they were kept at warehouses in their unfueled condition, i.e. they were actually new and capable of going on combat duty to serve for several dozen years. A part of these missiles will become the carriers of the first series of hypersonic glide vehicles in the next few years."

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Eventually, as the massive Sarmat—which is powerful enough to fly a South Pole route towards American targets—becomes operational, it too will be used to deliver the Avangard. “With the acceptance of heavy RS-28 Sarmat missiles for service, such vehicles will be mounted on them as well," the defense industry source told TASS.

The Avangard will apparently be equipped with a single massive thermonuclear warhead with a yield exceeding two megatons. With a yield that high, the Avangard will have considerably greater destructive power in an individual warhead than a typical modern ICBM, which have smaller yields usually no more than 500 kilotons.

Typically, most modern ICBMs—except de-MIRVed Minuteman IIIs—have multiple independent reentry vehicles (MIRVs). That suggests that the Avangard is primarily a counter-value weapon intended for an assured retaliatory second strike capability designed to bypass missile defenses.  Indeed, TASS’ source cites the need to destroy “especially important targets." Of course, a massive ICBM such as the Sarmat—or even the UR-100N UTTKn—could possibly carry multiple Avangard glide vehicles if needed.

The Russians claim that a production contract for the Avangard weapons has already been signed and that the weapon could go on alert as soon as next year. "After the first series of glide vehicles is produced and a controlling launch of a missile with this armament is carried out successfully, the Avangard complex may be accepted for service already in late 2018,” a defense source told the TASS news agency. “At the latest, it will be accepted for operation and placed on high alert in 2019."

Yuri Borisov, Russia’s deputy defense minister, had said earlier that the Russian Defense Ministry has already signed a contract to put the new weapon into production.  “The Avangard system that the president [Vladimir Putin] mentioned is well tested,” Borisov told the Russian language newspaper Red Star. “It came about through considerable effort, because temperatures on the surface of a combat unit reach up to 2000 degrees [Celsius]. It really does go through the air surrounded by plasma. Thus, the challenges involved in controlling and defending the system were considerable, but did eventually find resolution. Practical tests have confirmed the chosen approach’s feasibility. In fact, we have secured a contract for mass production of these systems. So this is no bluff, but a serious undertaking.”

Analysts are extremely skeptical that the Russians can put the Avangard into operation by next year. Asked if there was any chance that Moscow would field the weapon by 2019, Center for Naval Analyses research scientist Michael Kofman flatly answered: “None.”

Dave Majumdar is the defense editor for The National Interest. You can follow him on Twitter: @davemajumdar.

Image: Reuters.