Russian Cluster Adapter, RBK-250 Old Style
The designations RBK-250 and RBK-500 are the transliteration of the Cyrillic (Soviet) designations. These are air launched, high drag, freefall nose ejection clusters which employ a mechanical time tail fuze. The clusters may be loaded with fragmentation, antitank, incendiary, or toxic chemical bombs.
The clusters are painted olive drab or gray. Markings on the olive drab clusters are black. Markings on the gray clusters are black and white. The designation of the bombs contained in the cluster is stenciled on the front half of the cluster.
Nothing else to see.
Collaborative Ordnance Data Repository