OK, holy **** there is a lot of misinformation in this thread. Let me clear things up with facts.
An FFL is only required if you sell bullets
you manufactured. If you buy and sell Winchester, Federal, etc there is no FFL required.
If you manufacture anything on the Munitions List that are Defensive Articles under ITAR, you must register as a manufacturer. It doesn't matter if you export or not, it doesn't matter if you make anything for the military or not, if it's on the list and you manufacture it, you must register. It's not a license or permit, it's a registration. The purpose of mandating the registration of all manufacturers is the government wants to know who is manufacturing these items in case they are eventually exported or used by a non-civilian entity.
There are a few very strict exemptions to ITAR that apply to the firearms industry. "Sporting shotgun and sporting shotgun ammunition" and research and development. The US State department is no longer approving commodities jurisdiction so don't waste your time trying to convince the State Department that cast bullets aren't a defensive article subject to ITAR registration. They will deny it and continue to deny it.
For the doubting Thomas' among us, here is the law for you to read yourself:
http://pmddtc.state.gov/regulations_..._official.html