I believe that in some states only some guns and mags were grandfathered in. So none produced after the ban are allowed.
Mostly communist states like Kalifornia and some in the northeast.
Read the rest here: http://en.wikipedia.org/wiki/Federal_Assault_Weapons_BanThe Federal Assault Weapons Ban (AWB), or Public Safety and Recreational Firearms Use Protection Act, was a subtitle of the Violent Crime Control and Law Enforcement Act of 1994, a federal law in the United States that included a prohibition on the manufacture for civilian use of certain semi-automatic firearms, so called "assault weapons". The 10-year ban was passed by Congress on September 13, 1994, and was signed into law by President Bill Clinton the same day. The ban only applied to weapons manufactured after the date of the ban's enactment.
The Federal Assault Weapons Ban expired on September 13, 2004, as part of the law's sunset provision.
Really it refers to a time in history when women didn't use deordorant.
Rick
During the 10 years of the 1994 AWB ban all banned firearms and high-cap mags that were made after the start date had to be marked law enforcement use only. If you were a Civ and got caught with a loaded LE mag or ownership of a LE restricted firearm you could be charged. It was at this point Colt stopped making Civ "AR" models. When the AW Ban expired. You could own LE only mags and Firearms. In turn you can go to WallyWorld and buy a Colt LE6920.
DURING the AWB several firearms manufactures made changes to their configurations so they could continue importation and/or sales. as an example: AK's were renamed, removed folding stocks and pistol grips and replaced them with thumb hole stocks, they removed folding bayonets and muzzle devices, Altered feeding device locks and magazine capacities. AR manufactures did the same types of changes.
When the AWB expired, manufactures put these features back into production BUT also continue to make the "94 ban" models for restrictive states as mentioned above.