Chopperdoc:
As far as I know, they are just tools, not gun parts, and it is my understanding there should be no issue. I know some of my suppliers got some the AR tools I needed from brownells, along with invnetory they had on hand.
If you want to save some time though, I would give Casey over at TacOrd a call. I know he teaches AR armour courese and has and have a very good list as to the tools required, and for a small additional fee, will assemble a tool kit for you.
Just my 2 Cents
Regards
AbH