The Nikon will break on an AR-10. They’re discontinuing or have already discontinued production of rifle scopes.
Barrel manufacturer is the biggest variable in this equation.
If it’s a garbage company, I wouldn’t really mess with the rifle.
If it’s a Bartlein, Criterion, Hart, Krieger, Lilja, Mike Rock, Noveske, Obermeyer, PacNor, Satern, Schneider, or Shilen, it will command more value than one of the rack-grade or tent stake grade barrels that currently flood the market.
It also matters who chambered, profiled, and did the extension work. A lot of shops can take a world-class barrel and turn it into a turd just by working on it.