Well there are already deployed drones with tranquilizer dart guns that target humans. Used as "drone fencing" of sensitive areas. Example shooting from hexacopter: https://www.youtube.com/watch?v=tNOL9Kz2WNE
Uhm, that's not real or related. That's some guy's visual-effects project, and the drone is CGI.
Perhaps you meant the manufacturer's movie here? Good luck shooting a diving eagle. https://www.youtube.com/watch?v=OItoIIoSefI