The Auto-cannon is a linkless feed, fully automatic weapon that fires a hundred gram round at velocities of 1,200 meters per second with a practical rate of fire of 200 rounds per minute. Ammunition is provided in 200 round drums, two of which may be attached to the weapon at any one time. Two different ammunition types may be used, one in each drum, and drum selection may be changed at will. Replacing an empty ammunition drum requires one minute. If a loader is present, this may be done while the weapon is being fired from the other drum. Ammunition provided includes HE, and 20/9mm discarding sabot. Every tenth round in an HE drum is an incendiary round.
Auto-cannon begins development around TL-6 as the automatic fire version of a small breachloading cannon. By TL-8 they are filling a role between the 10mm-15mm Heavy Machine Guns and the larger artillery peices. These autocannon are used in a variety of roles, from helicopter and fighter armament, to APC armament and anti-aircraft guns. By TL-10 they have been largely supplanted by Gauss Weapons, Laser Weapons and later by rapid-pulse Plasma or Fusion guns.
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