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you wanted to know if the thread matched, and several places say they do.
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Yessir thats all I was trying to figure out. I'm pretty sure the headspace won't be exactly right, and it may have to be re-chambered slightly to work, but that could be the case even when swapping a barrel from one 700 to another 700. A few thousandths difference is to be expected.
By the way 5/8-24 thread is referring to the threaded muzzle on that AAC barrel.
The thread on the receiver end is 1-1/16" x 16 TPI a.k.a. 1.062" x 16 TPI
I'm trying to confirm that the model 7 shares that thread. All the info I've read on it says that the 721, 722, 660, 600, XP-100, Model 7, 700, and 40X are all the same barrel thread. I've done some more research since starting this thread and I'm pretty confident that its the same