The Flashbang is a non-lethal thrown device that blinds and disorients anyone caught near the blast. It is a newer addition for the series and points to more tactical options in GTA 6. Use it to break up a group or buy a few seconds before pushing into a room rather than for direct damage.
A tactical throwable like this is likely found during missions or bought once gun stores stock it. GTA 6 has not confirmed how these are sold, so treat world pickups and store restocks as the probable routes.
The community companion for Grand Theft Auto VI. Database, maps, guides and tools for Vice City and the state of Leonida.