Gain 13 Covert skins and 20 colours that can be used on any gun.
Note, only some skins can have their colours changed.
All guns' default metal skin colour can be changed.
Owning any weapon skin pack unlocks access to another 38 colours.
Charts
Roblox disabled public gamepass sales visibility in late July 2020. Sales data collected up to then is still available here for reference.