I guess that comes from my german background and a bad translation. In germany "optisch" means visual, so I basically wanted to say: The graphics of the weapons are very nice and I like that picking them up results in a different player model, that shows the gun in hands. Given the small time it would not have been strange if there would be just one player model with a standard gun. But seeing a change in the character visuals when picking up items always feels very satisfying.