I did not measure them, but theoretically they should be the same length, or the receiver won't be parallel to the trigger guard part.
By the way, what is the difference between center fire and rimfire rifle scopes? I am using center fire rifle scope on my ns522, is it necessary for me to get a rimfire rifle scope for it?
Thanks
A centre fires scope with fixed parallax iss et to about 125 yards. A shotgun scope is set to about 50 yards. I assume a 22 scope is set closer.
I use only centre fire scopes on my 22s. Seem to work fine.