Russian paramilitaries are mostly internal forces. They wouldn't be involved in any conflict with the exception of some of the Muslim units from the Caucus region, which were involved in fighting in Ukraine. The majority of Russian forces in Ukraine are either separatist forces from the eastern Ukraine or regular army units. Their recent militarization was calling up reservists and people that just finished conscription, so they also wouldn't be paramilitaries.

Why ? They only have few paramilitary groups and they are composed mostly by prisoners