To legally purchase a fully operational machine gun, you have to pay a fee and be separately approved for each gun you wish to purchase. It's a tax fee, and has nothing to do with a C&R license.
you have to apply with the BATFE
BATFE licensing office. Your local BATFE office is in the phone book. Ffirst page.
You will have to contact the BATFE to fnd out.
The BATFE has all the requirments on their web site.
In the US, the BATFE issues licenses for gun dealers.
Physically, it could be done. Highly doubtful it would be worth it to do that, rather than to buy an existing air rifle. Legally, a new receiver would have to be used - BATFE law dictates "once a machine gun, always a machine gun".
No such license. If you want to POSSESS a Class III firearm, you must be 21, and the transfer of the firearm approved by the US BATFE- but it does not require a license .
The BATFE website has all the forms and information you need.
You must consult a lawyer and the BATFE for a current and legally correct answer.
Only if it was registered with the BATFE by May 1986. It is a machine gun.
In the US, to engage in the business of buying and selling guns, you need a license issued by the Federal BATFE.
The BATFE website has the information you are looking for.