Hi my brother had recently started orks and i have a unfortunate infliction where i have to make VDR vehicals and i felt that his Waarrg needed a gargant but i dont know any thing abotu gargants other than the look like evil armoured ork santas with guns for arms

what back ground is there about them?

what kinda weapons do they have?

how meany crew and what crews them?

how do they 'walk'

and just abotu every thing elce you can tell me about gargants please