Rotor Cannon

A Rotor Cannon is multiple-barreled, ballistic rotary mini-gun first used by the Imperial Army and Space Marine Legions during the Great Crusade and Horus Heresy eras.

These weapons were essentially multi-barreled Stubber that used an electric motor to maintain an extremely high rate of fire from their spinning barrel.

A Rotor Cannon's medium calibre rounds lack the explosive power of bolts, but nonetheless the sheer volume of of fire achievable proved effective against unarmored hordes of foes and fleshy xenos.

Eventually, the more famous Space Marine Assault Cannon was developed from the Rotor Cannon.

In the late 41st Millennium, the Rotor Cannon is a favorite heavy armament of the Imperial Navy's Voidsmen-at-Arms.

It is common practice for one member of a voidsmen squad to carry a heavier armament. The standard choice is the Rotor Cannon.

With its multiple barrels and high rate of fire, the weapon has earned a number of monikers -- the "whirgun," "deck-clearer," and the "Emperor's chainsaw," to name just a few.