OTR-23 Oka
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The OTR-23 Oka was a mobile theatre ballistic missile deployed by the Soviet Union near the end of the Cold War to replace the obsolete SS-1C 'Scud B'. It carried the GRAU index 9K714 and was assigned the NATO reporting name SS-23 Spider. Wikipedia
Diameter: 0.89 m (2 ft 11 in)
Engine: Single-stage Solid-fuel rocket
Guidance system: Inertial with terminal topographic DSMAC active radar
Launch platform: Mobile TEL
Operational range: 500 km (310 mi)
Warhead: Nuclear 50-100 kt, HE fragmentation, submunition, or chemical