The minigun is a real Gatling style rotary weapon, best known as the M134 developed in the United States in the 1960s, whose multiple rotating barrels allow an extremely high rate of fire. That distinctive spin up and roar was popularised by action films and first person shooters, where it became the audio shorthand for a heavy gunner. Online, creators reuse recorded and game ripped versions as a standalone effect, dropping it into gameplay videos, soundboards and meme edits whenever a scene needs instant, over the top firepower.