How to properly do PAP camo for ported weapons?

Game Modding | Call of Duty: Black Ops 3 | Asset Importing

ModmeBot:

Thread By: ProRevenge

So how do I do the PAP camo properly for my ported weapons such that the camo changes to whatever people set it to in script, for example you add to a stock map, its The Giant camo, but someone adds it to their map thats set to Revelations camo, the gun will use Revelations camo,

Do I need a new model for the upgraded gun? do I need to change any materials or anything?

Also I only want one of my gun's 2 materials to change to the PAP camo, im sure thats possible?