mw702, the form that you'll have to fill out to buy from an FFL is the 4473 form. It can be found here: http://www.atf.gov/forms/download/atf-f-4473-1.pdf
A gunfight is not the time to learn new skills.
If you ever have a real need for more than a couple of magazines, your problem is not a shortage of magazines. It's a shortage of people on your side of the argument. -- Art Eatman