What about some company manufacturing a limited run (say 2,004) or
(one rifle 3,650 for each day the ban was in effect) of a Commemorative NRA
AR-15/M-16 style/type rifle, to celebrate the sunset of the AWB. They could call it the
APR-15 for American Patriot Rifle (or something different). It could have gold or silver engraving
and a catch phrase. Or something appropriate to celebrate the second amendment.
What do you think.Any Ideas?

You forgot the Leap Years.
That would make it 3,652 rifles.

And while the Ban is gone Federally, six States and DC still prohibit them.
So I don't think it would be all that worth while.

But if somebody DOES think it's a good idea, how about this:
The serial number has a date when the Ban was in effect.
Like this: nnn-091101.

The n represents a number from the Manufacturer, the 091101 stands for September 11, 2001.  The Ban was in effect that day.  And that rifle might sell for extra in honor of that day.

Thinking it along a bit more; 3,654: The Last Pre-Ban and the First No-Ban.

[eyes well up] im so excited![/eyes well up] i like the idea!

I think that is a great idea. I would like to have one with my wedding day as a serial number. It would mark my last free day in a non gun free time