The "Ban" refers to the 1994 Brady Bill which banned importation and further sales of certain style "Semi-auto assault weapons", plus the sale of high capacity magaines over 10 rounds with new guns. Any guns or mags mfg prior to the Sept 1994 date are consider "pre-ban" and can have all the evil features that "post-ban guns" cannot, flash hiders, bayonet lugs, folding stocks, etc, etc. The bill had a 10 year life span which sunsets this year. I'm sure Paco will add to this.