I would say hold on the model and watch some tutorials on the process first. http://cg.tutsplus.com/tutorials/autodesk-3ds-max/next-gen-weapon-creation-day-1-the-high-poly-model/
I believe that Mike was referring to your highpoly about the 90 degree angles. I found this tutorial useful is getting the general idea of how to make some high-poly models to bake from: Modeling for Next-Gen Games Tutorial.