UR-100N

Description: UR-100N, SS-19 Stiletto NATO designation, is an Intercontinental Ballistic Missile (ICBM) developed by the former Soviet Union as a replacement for UR-100 ballistic missiles. It is made up of two-stage, liquid fuel technology. Silo-based UR-100N, which entered service in 1975, has been deployed carrying six nukes yielding between 550- and 750-kiloton each and one nuke of 5-megaton (5,000-kiloton).

UR-100NUTTH, also known as RS-18B or UR-100NU, is an improved version with modifications involving engines and command system which was deployed from 1979. UR-100NU can be equipped with either one or six nuclear warheads. Following START treaties Russia is dismantling its MIRVed (Multiple Independently Reentry Vehicle) missiles which includes UR-100N missiles. As of 2005, approximately 130 UR-100NU missiles remain in service under Russian control.