FN didn't "buy the rights to the Model 70".
FN has owned the "Winchester" firearms operation & licensed branding for several years.
When FN closed the USRAC plant (which it owned) in 2006, it retained the Winchester rights then & through a later re-licensing from Olin Corp through Browning, also owned by FN.
FN later brought the 70 back, made in its South Carolina plant. Other "Winchesters" are built overseas, imported by Browning for FN.