Įach suit of Space Marine Power Armour is a work of supreme artisanship, and although it may be one of many, each is a unique artifact whose spirit and history is of deep spiritual significance to both the Chapter to which it belongs and the Space Marine who wears it. Working in concert, armour and Astartes together become a weapon without equal. The true genius of the design, however, lies in its close integration with the already superhuman physiology, senses and reflexes of the Space Marine within.

Integrated with the armour are networks of electro-motivated fibre bundles which mimic and augment the muscular strength of the wearer.

Space Marine Power Armour is an extraordinarily sophisticated defensive system which combines huge resistance to physical damage with a sensory array and sealed environment which protects its wearer from the ravages of the void and alien atmospheres. Need, circumstances and recovery of new materials and technology has shaped the armour's evolution. Over the history of the Imperium, power armour has developed into many different forms. Power armour has been in use since before the Age of the Imperium, from the techno-barbarians of Earth to the original Space Marines created by the Emperor. All armour may further be augmented by various artifacts, relics and enhancements such as pauldrons and greaves. Typically however these armours may not contain the same strength-enhancing properties or life-support functions of Space Marine power armour, nor do they provide the same amount of protection. Whilst power armour is most commonly associated with the Adeptus Astartes, the Sisters of Battle and many Inquisitors also use powered armour of one sort or another.

The backpack contains the main power plant, environmental system and additional stabilizers. It also commonly includes numerous auxiliary systems such as communicators and auto-senses. Power armour is fully sealed, isolating the wearer from the outside environment and protecting him from gas weapons and harsh atmospheres.

8.2 The Auretian Technocracy's power armour.

7.2 Delphis Mk.II 'Ironclad' Heavy Power Armour.

2.8 Mark VII 'Aquila (Imperator, Eagle) Armour'.

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