Well thankfully it was not me, I always included all parts needed.The metal itself is not that thick, but I apply a soft backing with increases thickness,and strength, and makes it nice and comfy to wear.
Wears like leather armor, but has a metal exterior.That would be the best way to describe it.
Once it is velcroed and strapped this stuff can take a load of trooping without fear of breakage.especially the knee armor, which is a problem I hear a lot of complaining about, so I solved it.My armor flexes a bit, so like a shock absorber it moves with ya.