Dunk your bolt carrier in mobil 1 (seriously). Let it soak for a while, just because. Pick it up and dry off the bolt face (not the rest of it.....let it keep dripping). Drop her in the upper and run a couple mags through it. That's what we mean when we say run it "wet". Keep that thing slinging a little oil for the first hundred or so rounds, and she'll smooth out.
If we still have issues after that, we can diagnose them one at a time.
She'll run.