I think this is the new primaris dreadnought we seen a teaser for some weeks ago.
I like the gun, doesn't look too futuristic though. The model as a whole seems to be huge, at first it looked to me like a toddler with a nappy/dipper from bellow the view port. Not a huge fan, would have been nice to see something less bulky in my opinion, perhaps more elegant like the contemptor dreadnaughts of old. Thoughts?