Bill, a suggestion for you...
The cost difference between a "substandard" AR and one that meets/exceeds the requirements of the military is quite a bit less than you might think.
You don't need to settle for anything less.
Since you are a member here, I suggest the following course of action:
1. Contact Grant at http://www.gandrtactical.com/
2. Ask him for the member pricing on the Daniel Defense XV M-4 carbine.
3. Send him your $ and wait for package to arrive at FFL.
4. Enjoy new rifle that meets/exceeds the military requirements.
I am a very loyal and satisfied G&R Tactical customer and recommend them with no reservations whatsoever.
~tp