I remember there was some old /k/ /k/ommando that made a blueprint of an NCR vest. I forget if it took metal plates or if it was the old fiberglass armor trick. But it was before commercial gucci plates were really on the market.
This uniform isn't just great for some post-nuclear soldier apparel, this is just a good uniform for the American west in general and would meet or exceed all standards until the Korean war era and forward, depending on if it's a flak vest or if it can actually stop any kind of rifle round. It's a hop skip and jump away from a modern American soldier but lacks all modern gadgetry and vehicle/industrial support. It's top tier stuff in and out of universe.