A MetalStorm: Online cannon.
This is the standard issue cannon, and the first cannon the player “acquires”. The Vulcan is always free, and thus has infinite rounds to use. Physically, the Vulcan is the smallest sized cannon out of all the available cannons. Out of all available cannons, this is the only one that does not have a rotating barrel.
Aesthetically, the Vulcan is a one-barreled automatic cannon, with a silver finish and vents on both sides of the muzzle brake.
A belt feed for a 20mm cannon.