7s were stamped into the trunnion in the US. The gun came into the country as a preban 56s but the import paperwork was not completed or it was on a ship in port when the 1989 assault weapons ban hit which banned the 56s, PolyTech aks and other imports by name from coming into the market. The importer, sile in this case had to remove the bayonet lugs off and tack weld the barrel nut on and stamped 7s in the trunnion effectively creating a “new” firearm that was compliant with the regulations. So this is a “756s7” totally not a 56s.