Autocannon - Notable Imperial Autocannon Patterns: Agrippina Pattern Mark II - A common pattern of autocannon utilised by the Astra Militarum.Gryphonne IV Pattern - Formerly manufactured on the now-devastated Forge World of Gryphonne IV, this pattern of autocannon is often utilised on the Salamander Scout armoured reconnaissance carrier. Ammunition for this smoothbore gun is fed automatically through a four-round feeding tray, and extra ammunition is dropped into the tray by hand. Other features of this pattern include recoil dampeners, electronic sighting and rangefinding.Herakles Pattern Accelerator Autocannon - This ancient pattern of Heavy Autocannon was only ever found mounted upon Sicaran Battle Tanks. These rapid-firing weapons fired shells at a much higher velocity than a standard autocannon, enabling them to successfully engage moving targets and strike with pinpoint accuracy.Ironhail Autocannon - The Ironhail Autocannon is a Dreadnought-sized Imperial autocannon that is deployed on the Invictor Tactical Warsuit as a primary weapon. The Ironhail Autocannon allows an Invictor walker to unleash a punishing hail of ballistic firepower at relatively close ranges.M34 Autocannon - The M34 Autocannon is an older version of a common Astra Militarum pattern, and is used throughout the Calixis Sector. It uses a tripod mount and can be manned by one person, though it ideally employs a crew of two to move, set up, and assist with reloading the weapon."Six/Twelve" Mauler Cannon - An adaptation unique to the Spinward Front of the Calixis Sector, the Mauler Cannon is actually a modified, twin-barrelled M34 Autocannon designed specifically for use by Ogryns. Rebuilt with a heavier frame, shorter barrels, a fire-limiter, larger handholds, and a triple harness capable of withstanding an Ogryn's strength, the Mauler Cannon gives Ogryn units an enormous boost to their firepower. Sadly Mauler Cannons have picked up the nickname "Six/Twelve" by regular guardsmen, referring to the number of shots an Ogryn will likely fire before they somehow break it or decide to use the weapon as a club.Syrtis Pattern Autocannon - A commonly used pattern of autocannon mounted on Predator Destructor tanks.Accelerator Autocannon - These rapid-firing weapons fire shells at a much higher velocity than a standard autocannon, enabling it to successfully engage moving targets and strike with pinpoint accuracy. A smaller version of these weapons are used by Primaris Marine Vanguard Suppressors.Icarus Autocannon - The Icarus Autocannon is a type of large autocannon utilised commonly on Imperial anti-aircraft arrays as well as by Imperial Knights. On Imperial Knights, it is linked directly to the pilot's mind via the Throne Mechanicum and can track down and destroy incoming enemy aircraft.Armiger Autocannon - The Armiger Autocannon is a type of autocannon wielded by Armiger Helverins. The Armiger Autocannon has a high rate of fire and is capable of laying down hundreds of armour-piercing shells per solar minute.Reaper Autocannon - The Reaper Autocannon is a type of autocannon used predominately in the 41st Millennium by Chaos Terminators. However at the time of the Great Crusade and Horus Heresy they were common in the arsenals of all the Legiones Astartes. Originally designed as a support weapon for Tactical Dreadnought Armour, the Reaper is a compact, rapid-firing autocannon which depends on the strength of Terminator Armour to stabilise the weapon and cope with its massive recoil.Cthon Pattern Autocannon - The Cthon Pattern was a type of autocannon deployed by Space Marine Legion Terminators during the Great Crusade and Horus Heresy eras.