"Wrong yet again. A private citizen can sell and mail a long gun to another citizen of the same state under federal law, and under state law here. One can also mail a long gun to an FFL even across state lines under federal law. Only state law in some states prohibits this. The fact that a particular gun is a class 3 weapon (SMGs and MGs) merely means that you have to pay the $200 tax on the transfer and fill out the forms for DOJ. It does not impact anything else about the transfer method."
Mail order to anyone, no questions asked..... right.....
http://www.targetworld.net/Steps for buying NFA (Class III Weaponry) 11-3-07.pdf
THE PAPERWORK SPECIFICS:
Class III includes, but is not limited to: machine guns, silencers, destructive devices, all other weapons (AOW: cane guns, pen guns, etc.), short-barreled rifles (SBR), short-barrel shotguns (SBS).
1. You must be at least 21 old and legal buy a handgun (meaning no felonies, violent misdemeanors, dishonorable discharges, etc.).
2. Call your local CLEO (chief law enforcement officer - sheriff, police chief, etc.) and ask what his procedure is for signing Form 4 (federal applications for NFA transfer and ownership-the dealers supplies).
Make sure that he will sign for you BEFORE you buy the firearm. If he won't sign, you can't get the gun. Make sure you can own it BEFORE you buy it, as payment must be made in full before the firearm is ordered. (You have to have the serial number before any paperwork can be processed to begin the transfer.)
3. Get two 2" X 2" color passport photographs. Attach one to the reverse side of each of the two copies of the Bureau of Alcohol, Tobacco and Firearms (BATF) Form 4 (Target World supplied). These photos typically cost $5 to $10 and are commonly done at places like Kinkos and Walgreens.
4. Complete a small section on the reverse side of the BATF Form 4 that declares why you wish to possess the item. Most folks say "collector of firearms" or “target shooting.”
5. Take the two copies of the Form 4, with pictures attached and your section completed, to your local law enforcement agency. Also take the two FBI FD-258 fingerprint cards we will give you. Ask the agency to officially take your fingerprints. This will usually cost $10 to $15.
You have to get a local CLEO to sign off and complete the section on the reverse side of the Form 4. This merely attests that you are not wanted locally and that the official knows of no law which will be broken if you are approved by the government. The official signing should be made aware that they are not held liable if you do something stupid or break the law
http://arizonagunlist.com/How_to_buy_NFA...EO_signoff.html
If you are not a prohibited possessor of firearms in general, and your state allows ownership of NFA weapons, then you can buy or make one yourself. The process is straight forward:
Find and purchase the weapon you want through your local Class 3 gun dealer. You can also perform a Form 4 transfer between private citizens at a Class 3 gun dealer (or without the dealer if both parties are in the same state). The dealer will start the paper work once the item is paid for (the paper work is weapon specific, and must have measurements, or serial numbers as needed).
File the appropriate paper work, usually a BATFE Form 1 or Form 4 (including fingerprints, your recent photo, and a signature from your local chief law enforcement officer (usually the sheriff), and send in the standard fee of $200). If you are transferring an AOW then the fee is only $5.
Wait one or two months, or longer if there are errors in the paper work, for approval and pick up your new NFA weapon at the Class 3 gun dealer.
Now while that may seem to be a simple process, many people have run into chief law enforcement officers (CLEOs) that don't understand what the sign off on the BATFE form is and won't sign it. The reason why the BATFE wants a CLEO signature is to attest that the CLEO has no reason to expect the applicant to commit any wrong doing with the weapon they are making or transferring. The CELO also attests that the applicant will not be in violation of state or local law by possessing an NFA weapon.