Jungle Thunder pack

Some really great-looking weapon skins just went on sale in the Jungle Thunder pack, at least in my opinion!

Has anyone here bought the Jungle Thunder pack and can tell me whether the weapon skins apply to all modifications, or if the skin look only applies to a preset attachment build, meaning a specific optic, underbarrel, muzzle, magazine, barrel length/weight, etc., and once you change the modifications to fit your own preferences, those parts go back to the default look, meaning the standard black factory attachments?

Weapon skins included in the pack:

• Jungle Defense VCR-2

• Mud Bath GGH-22

• Tropic Assault PW7A2

• Tree Feller 9K38 IGLA (not part of this question)