RS-26 Rubezh
The RS-26 Rubezh (Russian: РС-26 Рубеж, meaning frontier or boundary), designated by NATO as SS-X-31, is a Russian solid-fueled intermediate-range ballistic missile (IRBM) with a nuclear warhead, of which the range bracket just barely classifies it as an intercontinental ballistic missile (ICBM). It is equipped with a thermonuclear MIRV or MaRV payload, and is also intended to be capable of carrying the Avangard hypersonic glide vehicle.