One of the obvious ways would be to get a recoil pad. Limpsaver and Magpul both make one, probably others.
Any standard muzzle brake will help. I've not found a significant difference in felt recoil between various brands of similar design.
You can also add weight to the rifle to reduce felt recoil. On an AR-10 adding enough weight to matter might be difficult.

Added a quick link:
https://www.amazon.com/LimbSaver-Rec.../dp/B00Z6JOXQC