This is the Walker from the Diorama 'Walk the Wartracks', which was built for the Military Group Contest.
Credit to the raging part of the name to tnickolaus.
Heavily inspired by Moko's, Masamune Shirow's design. I also think that the legs of the recent walkers of Brian 'Mondayn00dle' K. inspired this leg design.
Andreas...Thanks a lot for your feedback. I looked at that part and indeed there could be a cover for armory reason. You have a good eye! But aesthetically - how the shape flows - I think that I prefer it as it is.