Ok, I was always of the understanding that military firarms were parkerized or coated in a material that held/absorbed lubrication to keep lubrication where its needed.Well, it DOES depend on the type of chrome, but right now, I would say:
1. NASA's research (well, LRC in Cleveland for NASA).
2. My brother, the Man of Steel, who runs a steel plant for AIT in PA.
3. Eugene Stoner.
But, if your objection is based on "distinction without difference" especially for Title I guns, then it is likely valid.
I mean the greatest AR makers in the world at Colt don't use chrome, so . . . why should any of us?
I'm not sure chrome and some of the other modern finishes do that as reliable as what Colt and FN use.