Hey, machinists!
As you may recall, during the Letter from the Producer LIVE Part XXVIII, Yoshida mentioned that they'll look into adding a text command which can be used to remove the graphical display of your gauss barrel. I'm pleased to let you know that this text command is currently planned to be implemented in Patch 3.3!
Please note that this feature will only hide the display of your character's gauss barrel and on your client only!