Dern,, I may have made a big mistake.
I was thinking of Ruger's AR-15 line, NOT the full auto AC556.
It's been a while since I fooled with any of the AC556 stuff, even in questions & all,, and the current craze of the AR stuff,, my wires crossed.
Unless they made a big change in the way a Mini-14 is made,, I doubt they would have changed the barrel threading for any of the Mini-14 line. So,, it should work just fine.
Boy,,, this is my second mistake in the last 2 days about stuff. I'm gonna have to reset my batteries & reboot the brain!
My apologies.