"Weakness" can only hold 16 weapons at once....

Quote from Creative

"Weakness" can only hold 16 weapons at once....

Apparently you misinterpreted that.

What it means, he can have three swords, or four handguns, or a sniper rifle,or two shotguns, or two assault rifles, or three sub-machine guns or a large gun at the same time. It is a limitation.

exactly as he said. They are just different combinations he can have. The "OR" means those are the different kinds of things he hold in amounts