I can’t speak for AMS, but to me those pieces are more like lamellar and/or scale armor, and that’s what I intended those to be in my original work. Chain mail would look a bit different:
Going for that chainmail look in Heromachine, I’ve used another item, e.g. here. What I do is I mask it onto cloth items from the Tops and Legwear categories, with varying degrees of success.
Going for that chainmail look in Heromachine, I’ve used another item, e.g. 
?? Has anyone tried using various braids from Hair for chainmail texture?
