So, I was trying to open an XMODEL_BIN file for a viewmodel from AW using the Asset Editor, but there's this issue where I try to open it and gives me this "Assertion Failure" message and about 15 error message boxes. What am I doing wrong?

So, I used Lime to rip the models out of Advanced Warfare, but when I tried to open a viewmodel in Maya, the model is shaped like the letters "FX" instead of a gun. What do I need to do? I'm new to this and I really have no idea what to do.