Mega Armour description

"A suit of mega armour is comprised of extremely thick metal plates welded onto a piston-driven exoskeleton. It incorporates several engines and sub-motors that give the wearer tremendous strength. Each suit of mega armour has to be individually tailored by the tribe's Mek, who makes a great fuss of taking the customer's measurements before just hammering together whatever he has to hand. The end result is nevertheless a spectacular creation, bedecked with the Meganob's favourite trophies and kill-markings. [...] Meganobz carry so much metal plating that their only real weakness is their immense bulk. It is not uncommon to see a Meganob's comrades straining to get him back on his feet after a direct hit from enemy ordinance. Such is the resilience of Ork engineering and physiology that the Ork in question will quickly be back in the fray, ready to wreak his bloody revenge."

- Codex: Orks 5E, Page 39