Black stripes on right side look fine it is only the left which the angle does not look correct.
Depending on your GML (garrison membership liaison) your tube stripes should be ok, it is not the thickness of the stirpes it is they are applied wrong, there should be more fall from the top at the front if you compare image below. BACK ///////// FRONT, yours are BACK \\\\\\\\\\\\\ FRONT
Once again it is up to your GML in regards to tube strip width, they just appear wide in the images, 16mm width is closer to screen.
More info on tube strip width:
https://www.whitearmor.net/forum/topic/25372-stripes-template/
https://www.whitearmor.net/forum/topic/24261-lemaxims-rs-pvc-anh-stunt-build-rs-wip/page/5/