This file is the prototype version of the crab that I was lucky enough to snag from the MWO forums a few years back. It is a little different from the official version that made it into the game. Hardpoints were revised to allow them to print better on an FDM printer and other small or broken geometry removed. The files were resized to my version of 6mm. I do not suggest printing as one part on an FDM printer, though I did include it for scaling purposes.
This file still has a thin wall issue in one place with the legs that I couldn't figure out how to fix, it did however print fine on my printer so your mileage may vary.
(Note: The parts are not oriented for printing, cura profile I use is included.