Douglas AC-47 Spooky

Originally used in WW2 and Korea this aircraft went through several modifications and was used in Vietnam. The Vietnam version was a Convair C-131B Turbo-Prop Airplane equip with General Electric Gatling Guns (Mini-Guns). American and South Vietnamese ground troops often referred to this plane as Spooky or Puff (for- Puff the Magic Dragon).
The use of this plane was depicted in the movie 'Green Beret' with John Wayne.