Donie,
Those $200 AKs never went away...mechanically. They put a different stock on it and called it a MAK 90. Just like almost every other semi-automatic gun, the exception being the high end Belgian, Swiss and German designs. Other guns were simply tooled up for and built in the US without the evil bayonet lug or flash hider. Eventually even the HK and FAL series were tooled up for here and are currently in production.
The ban's greatest impacts were economic. A $200 Thompson L Drum became an $800 item. The Tippmann belts were going for $2.00/pocket IF you could find someone to sell you one. Most importantly, it completely changed the economics of the guns themselves.
I remember when a $200 AK would sit on a store shelf for months. Suddenly, "They're going away" and people who would never have bothered, decided that they had better get theirs. Demand up, prices up. Lots of guns going to people who aren't willing to ALSO take the time to learn, care for and be safe with guns. And finally, the real kicker....they are now expensive enough to justify BUILDING YOUR OWN!
Parts kits are reasonable and you can EASILY see how talented the machinists on this board are. Building a gun out of some pipe and welding it (STEN) takes about 6 hours. M-16 Receivers can be CNC'd in about a day for a one-time piece. AK's require some folded sheet metal. There are even groups like this BB that are dedicated to CNC machining of interesting gun receivers and they do some pretty nice stuff.
The only real impact of this thing sunsetting is the availability of high capacity magazines again. New Thompson drums are being made, as well as the Tippmann belts. I'm making some seriously evil magazines for a miniature Nordenfelt gun and for my Gardners. I may have to sneak in a Broadwell or Accles drum for a future Gatling. Don't panic, the world didn't come to an end.
Joe