What named creators run on Osa, and every option the game allows. Plus the gadget interactions that decide the matchup.
Primary and attachments: NotJoeyBlack and Rasco100's pick. The gadget list is every option the game gives Osa; nobody we read picks between them.
Rainbow Six counters are gadget interactions, rules of the game rather than statistics, so every pairing here comes from the two operators' own kit pages: the mechanism from whoever wins it, the gadget it beats from whoever brings it.
Osa's Talon-8 is transparent and bulletproof, which is what makes holding a window behind it safe, and Noor's page says to point the Horus Lance Launcher at shields and deployed devices alike.
Clash holds a lane behind a shield and tasers whoever closes. Osa's Talon-8 is transparent and bulletproof too, so the team holds the same lane from outside taser range.
A Banshee slows anyone who walks near it, and a deployed Talon-8 lets the Attackers hold and shoot from outside its radius instead of walking into it.
Osa is an Attacker in Rainbow Six Siege.
Rainbow Six's counters are mostly deterministic gadget interactions, rules of the game rather than statistics, so we state them from the two operators' own kit pages with no telemetry needed. A pairing is only written where the winning operator's page names the mechanism, which is why plenty of operators here carry none. Statistical data is based on external APIs and publicly available information. It may differ from official data.
NotJoeyBlack, Rasco100 and SINOOS publish loadout picks under their own name, and this page credits each of them rather than averaging them into a single answer. We measure nothing ourselves. The list of what Osa can equip is the game's own, and is separate from anyone's opinion about it. Statistical data is based on external APIs and publicly available information. It may differ from official data.