ADS camera not following the vertical axis

Hello,I am extremely new to UE4 and have only been using it for a few days .
I have tried to set up an ADS Cam but it seems to have failed miserably, and i really could use some help.
I have set my ADS camera to the parent socket ADS on my AK and have turned on use controlled rotation,
however it only really works on the horizontal axis which i perfectly lined up,but the vertical axis has really bad clipping and im not sure why,
Any help would be most appreciated…
link and photos of the problem.

Vid please ingnore sound it was playing in the background.