I'm a experienced gun porter/modeller and I know how to rig. I've been doing this for at least 3 years maybe 4 years just because i enjoy it. But I've encountered an error which is annoying me,I've tried fixing the normals and it still failed. I've exported my model as OBJ and then rerigged it and it still happens. Here's a screenshot-



If anyone could help me it would be much appreciated.
And here is my Maya if anyone is interested and if you've played Destiny yes that is the Khvostov