Currently they are assembled in Portugal and imported into the USA by Browning Arms Co. I believe that they are made with parts produced by FN (in SC) which are shipped to Portugal for assembly.
This is a fairly recent development. I think this has been the procedure for the past year or so. Before that they were totally produced and assembled by FN in SC. I guess FN could not keep up with the demand. New Model 70 rifles have been somewhat scarce for a while.
It is odd to see the "Imported by BACO, Inc., Morgan, Utah - Made in Portugal by Browning Viana" stamp on a Model 70.