An Ultimak rail might allow a lower 1/3rd co-witness with the right rings for the factory irons.
Alternatively you can get a dovetail M14 sight base from Cogburn Arsenal for a taller front sight (1/8"+ increase) and replace the rear with one from Tech-Sights or Accuracy Systems.
See through mounts will put the scope pretty high.
Mount the factory rings a see how it works out. Brass hitting the scope should not be a problem. The brass comes out more to the side, usually.https://www.youtube.com/watch?v=GmCTPM65xoA