Topic: The sub-weapon in a multi-weapon should also change the optics when upgraded.
Reason: Since we now have upgradeable weapons, it would be nice if the attached sub-weapon also changes optically when upgrading a multi-weapon, since you currently have to upgrade 2 weapons individually in order to have it uniformly, and with a further upgrade a 2nd or level 4 a 3rd weapon must be made and rebuilt into a multi-weapon.
Additional reason: This is especially annoying with a CV multi-weapon. Since with a double CV multi-weapon for the upgrade, another CV must be upgraded as a sub and added to the current multi-weapon so that it fits again.