The question is open: did the Russian Federation modernize the cassette airbombs RBC-500
The event itself is called anxious. However, it is doubted whether the Russian Federation was able to make the bomb planning, and how to treat the threat of a cassette bomb at all. The bomb itself RBC-500 is a kind of shell that contains a certain amount of small-sized sub-barrels. They are designed to defeat targets in the squares.
Depending on the battle part of the RBC-500 may have: however, the authors note that the use of RBC-500 in the anti-tank performance of the Russian Federation was used in Syria. Even then, it was stated that the maximum distance of the lesion of the aircraft allegedly reaches 50 km from the target. There is no evidence in the open access to confirm the range, but there is a video of the use of RBC-500 in civilian development in Syria.
If you try to answer the question of how realistic to integrate the UMPC module into the RBC-500, there are several points. Regardless of the equipment, the design of the RBC-500 implies that the cassette should be separated by the shank so that the sub-erasters can be fired at the target. There are open accessories of the UMPC modules, from which you can see that they do not involve compartment in flight. Therefore, the possibility of integration of a set of wings on the RBC-500 remains open.