I have a Spectre on my 10/22. I have thought about having it upgraded to a II but it's not worth the time and money to me.
I bought a spare factory barrel and had it threaded 1/2x28 by a machinist that my dealer and I used to use for all our threading needs. The front sight was removed for this work. I wish now I had got one like this that still has the sight.
http://www.gem-tech.com/store/pc/Rug...rrel-20p37.htm