How do Specialisation Armour Mods work?

I’m not too far from getting on to a specialisation but before I do, I want to know how Armour Mods work. Can someone on a specialisation please tell me if Armour Mods replace Support and Tactical Packages or have their own slot so you can use Support and Tactical Packages with Armour Mods simultaneously.

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They show up in either support or tactical and you get to choose the ones you want like any other “perk”. Basically it just gives you more choices.

> They show up in either support or tactical and you get to choose the ones you want like any other “perk”. Basically it just gives you more choices.

It also gives you weapon skins and more armor permutations.