>>3836667
Upon looking into it more, I think it's just on hakika's part, since he uses a custom icon set for the MZ games (pic related) and there are more than a few unused icons. I don't think hakika made these icons, so probably what happened is that he didn't want to make edits of them for each and every weapon. He has been hiring a sprite artist for the characters lately though, I think he can afford to do weapon icons again with their help.
Also, the weapon icons in the VX Ace games were just stock RPGM ones from the RTP, if you didn't know.