I have read a few posts on this and other forums from shooters wanting to mount scopes on their C&R rifles. It is difficult to mount scopes on a milsurp rifle, even using a scout mount type scope, because of the bolt handle or bolt location.
Aperture sights are a very good alternative, but were not offered originally on many rifles.
Mojo sights look like a very good alternative to scopes. UI intend to buy one for my M39 and probably my K31, and leave my 98k and M96 as is.
The price is good and I haven't heard anything negative about them. Aperture sights are almost as accurate as a scope, but without the magnification. Aperture sights are almost as fast as open sights in brush.
It's worth thinking about if the open, original sights are a problem. I am 45 and the sights are becoming a problem for me. I also like the aperture sights on my M1 carbine.
Later,
Jim
http://www.mojosights.com/index.html