If you
have to put a sling on it, I vote for an Uncle Mike's split band on the magazine tube w/QD stud, and a second QD stud threaded into pre-drilled hole in the buttstock bottom line about 2" forward of the stock toe.
I use the issue front post with peep sights on both my Rossi Model 92's - a Williams top-mounted 5D-94AE on one, and a Skinner Lo-Pro mounted in the bolt safety on the other.
If you're going to go with barrel sights, Marble's and Lyman both make several replacement rear sights - BUT fitting
may be problematic if your barrel dovetail's oversize. (mine weren't)
.