Perhaps you're missing my point - why would military weapons be of any real use to civilians?
No, you are missing several points.
1) in America the main reason to own guns by citizens is NOT to hunt. It's to allow individuals to protect themselves if ever needed to do so from any government, both foreign or domestic.
2) There is no "military" only gun available for citizens. The only military feature in guns we no longer let people purchase on new guns is shooting modes beyond semi-automatic. Which means no burst fire and no full auto fire.
3) A gun with gun metal bluing, ridged industrial looks, a detachable magazine, and floating rails to mount accessories does not make it any better or worse than any other rifle. Just because the stock is made from a polymer instead of wood doesn't mean anything else that the rifle is a little lighter to carry.