FPS gun model stretching.

I am having a problem with my FPS project. I have an odd problem with my gun model stretching on start of the game and again when I look up or down. It is only along the global Y coordinate as far as I know.
I have the model parented directly to the camera that rotates when the mouse is moved. Rotating side to side has no stretching of the model. Only when I look up and down does the model begin to skew.
Now I have been having problems with this for about 6 hours now, and I have checked every solution given. But After every slight change or reimport of the model, I begin to grow tired. So I am going to sleep, wake up tomorrow, and check this post. Any idea is greatly appreciated, even if it may be redundant.

 

I suggest that you post after sleep instead of before. Since this would aid in posting in the correct forum. These scale issues usually appear if the parent isn't uniformly scaled.

 

@I_just_need_help
Okay. Post a screenshot or short vid of the skewed model.