I'm half way through the movie at my friend's suggestion. In the movie, the form is used by an invading Soviet army to track down civilians who own guns. I was surprised that the forms are that old, in fact in Wikipedia it says, "These forms are given the same status as a tax return under the Privacy Act of 1974."Go to the sporting goods store. From the files, obtain form 4473. These will contain descriptions of weapons and lists of private ownership.
I found this interesting and just thought I'd throw it out there.