The Sirius Heavy Attack Drones can carry a total ordnance payload of 300 kg to 400 kg. At the Army-2020 forum, it was displayed with a range of weapons like guided aerial bombs FAB-100 and, KAB-100, OFAB-250. The Sirius attack UAV from Kronstadt is touted to be the biggest Russian drone with a wingspan of 30m. It is intended to support the surveillance missions at the borders and the Russian exclusive economic zone (EEZ) in the Arctic and the Pacific
