While playing offline mode, using the M4, I went prone and tried using the 360 Prone, and while ADSing, you can notice clipping occurring into the iron sights and scopes, blocking your vision, which can be game breaking.

This occurred with the black leather jacket, and the plate carrier w/ holster, that was causing this clipping as shown in the video clip.

This is especially noticeable in magnified optics like the M4 AGOC optic.