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Mark II armour is believed by many to still be the most efficient example of power armour design, although with the caveat that the overlapping hooped armour plates are difficult to repair. It can still be found in operational use - in extremely limited numbers - amongst several [[Space Marine Chapter]]s.{{Fn|1}}

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DAHeresyArt.jpg|[[Dark Angels]] Mark II Armour with Paravane-pattern helm{{Fn|55}}

WEHeresyEra.jpg|Heresy-era [[World Eater]] in Mark II Armour with [[Sarum]]-pattern helm. The Sarum helm became a forerunner of later pattern{{Fn|54b}}

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The Mk.III is sometimes worn by ceremonial guards due to its visual brutality, and can also still be found used in close-quarters situations by various Space Marine Chapters. It is commonly called the Iron Suit or ''Armorum Ferrum'' in recognition of its great strength.{{Fn|1}}

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==='''Mark IV "Imperial Maximus Suit"'''===

[[File:Mk4 maximus armor 200.jpg|thumb|250px|Mark IV Maximus Armour{{Fn|60a}}]]

The round nozzles on either side of the backpack are not only for heat dissipation but also could be used as stabiliser jets in zero gravity conditions.{{Fn|27}}

*'''Achean Pattern'''

[[File:Achean Pattern Thousand Son.jpg|thumb|right|170px|Achean Pattern]]

BAMkIV.jpg|[[Blood Angels]] Kepharel-Pattern Mark IV Variant Helm{{Fn|55b}}

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By the time of the Siege of Terra, Mark VI was the most numerous pattern in service, the Loyalist Legions defending the Imperial Palace had whole Chapters equipped with Mark VI armour, while the Dark Mechanicum hacked the data vaults of those still loyal to the Emperor to provide the designs to Horus and his forces. With countless Forge Worlds under the control of the Warmaster, production of Mark VI armour continued apace, and the Emperor’s Children in particular used it en masse during the Siege of Terra. The predominance of the Corvus armour would continue well into the Scouring and the present age. {{Fn|48}}{{Fn|51}}

<gallery heights="200px" widths="300px" mode="packed" caption="Images and Variants">

MkVIWolves.jpg|[[Space Wolves]] Mark VI helmet variant{{Fn|53}}

CorvusAlpha.jpg|[[Alpha Legion]] Mark VI "Corvus-Alpha" variant{{Fn|54e}}

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==='''Mark VII "Aquila Armour"'''===

Mark VII contains its own back-up power supply and a solar array to recharge this, so the suit can operate even without its backpack though only a short time.{{Fn|39}}

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==='''Mark VIII "Errant Armour"'''===

[[File:Mk8power armor.JPG|thumb|250px|Mark VIII Errant Armour]]

The Mk.X also allows for the utilization of a new breed of weaponry, such as [[Bolt Rifle]]s, [[Assault Bolter]]s, [[Heavy Bolt Rifle]]s, [[Boltstorm Gauntlet]]s, [[Auto Bolt Rifle]]s, [[Melta Rifle]]s{{Fn|40b}}, and [[Plasma Incinerator]]s.{{Fn|23}}

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==='''Runic Armour'''===

{{Main|Runic Armour}}

The [[Space Wolves]] grant valiant members of their Chapter specially crafted suits of power armour inscribed with runes of protection by the [[Rune Priest (Space Wolves)|Rune Priest]]s. These provide the wearer with a defence against psychic attacks. This armour is created by the [[Iron Priest]]s, and at least some examples are known to be codified as the Mark XII Lupio pattern.{{Fn|2}}

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==='''Aegis Armour'''===

''Main Article:'' [[Aegis Armour]]<br>

[[Grey Knights]] wear Aegis Armour, power armour that is incredibly well crafted; anointed and inscribed with prayers and wards, ritually consecrated and psychically charged. The suits are generally based on components from Mark VI, VII and VIII power armour designs, with a modified helmet design with a tapered, knight-like visor.{{Cite this}}

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==='''Terminator Armour'''===

{{Main|Terminator Armour}}

Like [[power armour]], Terminator suits have an outer shell of [[ceramite]]-bonded plates powered by electrically-motivated fibre bundles. Plates of heavy [[plasteel]] further armour the ceramite sections, especially on the front of the suit. This extra armouring provides a level of protection that is far superior to normal Marine armor; not even a [[Missile_launcher#Imperial_Munitions_Types|Krak missile]] will penetrate the suit's breastplate.{{Fn|59}}

==='''Sisters of Battle Power Armour'''===

* {{Main|Sisters of Battle Power Armour}}

The [[Sisters of Battle]] use a version of power armour designed for the [[human]] shape and size, known as Sororitas Power Armour.

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==='''Custodes Power Armour'''===

* {{Main|Custodes Power Armour}}

The [[Adeptus Custodes]] are clad in finely wrought golden armour. Their Power Armour is made from [[Auramite]] as opposed to [[Ceramite]].

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==='''Vratine Power Armour'''===

* {{Main|Vratine Armour}}

Vratine Armour is a type of armour used by the [[Sisters of Silence]]. which shares design elements with both the power armour of the Space Marines and the silicate-mesh of [[Selenite]] void-mail{{Fn|36}}{{Fn|37}}

==='''Inquisition'''===

Power armour is also favored for use by agents of the [[Inquisition]] and those individuals wealthy enough to afford one, such as [[Rogue Traders]]. These suits of armour enhance the user's strength, allow for operation in hostile environments, and include auxiliary systems such as vox-links and auto-senses. Like the [[Adepta Sororitas]] though, the lack of a [[Black Carapace]] means these users cannot fully interface with their power armour and so do not enjoy the same strength enhancements and other advanced support systems typical to Astartes power armour.{{Fn|7}}

=='''Non-Imperial Power Armour'''==

==='''Exo-Armour'''===

*{{Main|Exo-Armour}}

'''[[Exo-Armour]]''' is extremely durable and advanced Power Armour produced by the [[Squat]]s of the [[Leagues of Votann]]. Often compared to [[Terminator Armour]], it is capable of shrugging off heavy fire and turning its wearer into a living battering ram.{{Fn|56}}