I am another that likes a peep sight on a lever gun. Mine was not a Williams, but it was an old Redfield. All steel and well made. I had a big aperature, and a small aperature. Sometimes I just left the aperature out and it was like the rear flip sight on an M-16. The Redfield has kind of an odd sized thread for the eyepiece, something like #7 x 32. None of my Anschutz sight parts would work even though I bought a thread adapter bushing.