Underbarrel Attachments Broken!

Can someone please compose a list of which combinations of Skins, Weapons and Weapon Editions, Underbarrel Attachments and so forth that are actually still working in sync please, I don't have all the attachments for all weapons, I also don't have all the weapon editions available and I still have some skins to unlock, but seriously what is the point in the grind if you can't get the basics working properly, the field of view and the consistency of this view is the absolute bare minimum of the basics, I've also purchased some skins and weapons that are completely unusable!! You can't play the game half blind because all you can see is a wonky gun taking up half of your view, I don't know if there is any adjustments you can make on a PC or on a small screen, but on Console and TV it's absolutely awful!!! Come on please can you sort this issue, it's the fundamental basics of a first person shooter.