Which AR-10 model did you purchase? Are you looking for a long range optic or something for close range hog hunting or home defense?
What is your max budget? Some of us may get carried away and recommend a Nightforce or high end Leupold. There are great scopes at every price point and I don't know two people here who have the same riflescope.
I think just as important as the optic you go with are the scope rings or mount that you use. I like ARMS mounts or Badger Ordinance.
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