I have tried checking with several sources; some say that the required age for a Federal Firearms License is 18, others say 21. I have also read that different ages are required for purchasing certain types of firearms (shotguns, handguns, rifles and respective ammunition). Does anyone with experience in this field know what the correct required age (for each, if necessary) is?
I’ve always been a legal citizen and have no criminal record, so no factor other than age (I’m 17) prevents me legally from being able to hold a license.
I am particularly interested in rifles, such as assault rifles and battle rifles in .308 Win, 7.62mm, etc. Are there any other requirements for these types of firearms?

Unlike most most 18 year old people I take pride in the fact that I’m pretty knowledgeable about gun laws. now I’ confused about some shotguns falling under AOW. my understanding is that as long as there barrel length is 18 inches and there overall length is 26 inches no paper work is required. I saw on Yahoo that if it has a pistol grip and a front vertical grip then it falls under AOW and requires a 5 dollar stamp form the BATFE. how does that fall under AOW if it meets the length requirements?

The only thing I see for shotgun under AOW is

"A short-barreled shotgun which came from the factory with a pistol grip is categorized as an AOW rather than a SBS, because the Gun Control Act describes a shotgun as “…designed or redesigned to be fired from the shoulder…”

My Grandpa left me two shotguns in Illinois when he died. I was pretty young at the time and now I’m living in Colorado where I just passed my hunter’s safety course and am looking to get a license to hunt duck this fall. From what I’ve been able to find, his brother (who held on to the guns) can’t send them to me unless I’m a licensed dealer. Thus, I’d have to go to Chicago and pick them up in person (a decent drive). If you know of anything different, please let me know.

I am interested in obtaining an FFL to become a dealer of rifles, shotguns, and handguns to supplament my income and as a hobby more or less. I have already ordered ATF Form 7 and fingerprint cards.

Questions:
What other forms should I order?
How much does liability insurance cost for such a business?
How should I structure my business (sole proprietorship, LLC, etc?
Any other tips or suggestions?

Thank You!