Allow Weapon Skins to Be Applied to All Compatible Parts

Allow purchased weapon skins to be applied to every compatible part available for the corresponding weapon, rather than only the specific components included with the skin. Currently, a skin may cover only a particular suppressor, barrel, grip, magazine, or stock. Replacing one of these components with another compatible part causes the new component to use its default appearance. Expanding skins to cover every compatible weapon part would allow players to customize their builds freely while preserving the appearance of the skin they purchased.