Machine guns are cool. Miniguns (or Gatling guns, or chain guns) are machine guns with many barrels. This one is reallyfun: it shoots 40 rubber bands per second!
Here’s a dual version:
This Lego machine gun shoots about 10 rubberbands per second.
This Lego Gatling gun is slightly faster, but ultimately quite a bit cooler.
This is the real thing, mounted on a helicopter. Note that only about every tenth bullet shows up in these images.