Unfortunately ar10’s and ar15’s are two different animals. There are two different patterns for the ar10. I’m not 100% sure but I don’t think an aero upper will work on a psa lower. When I was researching an upper for my aero lower I kept finding that the psa uppers wouldn’t work, I would assume the opposite to be true as well. I have about given up on finishing an ar10.@ERE99 , PSA's Q&A generally answers that the PA-10 lower will work with any upper. I see nothing unusual about my lower, and, while my AR-10 does not have any Aero components, my AR-15 does, and there were no fit/compatibility issues there. I hope this helps.
Hmmm.....id say we're in a unique situation.....you wanna sell your Aero lower or buy my Aero 6.5 Creedmoor upper? Lol (I'll throw in dies and brass )Unfortunately ar10’s and ar15’s are two different animals. There are two different patterns for the ar10. I’m not 100% sure but I don’t think an aero upper will work on a psa lower. When I was researching an upper for my aero lower I kept finding that the psa uppers wouldn’t work, I would assume the opposite to be true as well. I have about given up on finishing an ar10.