I need help with a model

Hello, I am fairly new to unity and I started about a week ago. Im trying to add my first set of arms for gun animation and other animations. I have been trying to fix my issue for about 4 hours before I decided to ask for help. (Notes: It should have something to do with my weapon camera, if I turn off the camera it goes away.) If anyone could help me with any type of advice that would be great!