The Assault Crab was built to fight Tyranids.
It was given extra leg armor to protect the legs from even more damage and the rails gun was replaced with the Long barreled Burst Cannons.
But even long barreled 27 inches isn't to far.
So more armor was needed.
It has 2 long barreled and 2 normal barreled Bursts for a total of 12 shots per turn.
Anyways here it is.
(I still need to sand and make the leg armor smoother and more flowing like the crisis legs are.)