Nice Elk.
AR10 is like any other weapon. Look at what you have in and on it. You have a grip pod, old school triangle gas block/front site, heavy rear shoulder stock etc. No clue on the weight of your optic also.
That being said, 9 pounds isn't heavy.
Weight and where it is on your weapon matters. I have a BSF carbon barrel on plus have been very aware or what is and isnt on my weapon.