Not sure exactly your definition of primitive, but I've mounted a Williams WGRS receiver (peep) sight on my TC Omega, and love it. I replaced the fiber optic front sight with the smallest ivory bead that I could get. I use various size apertures depending on light conditions. They are easily changed in the field. I took a nice mule deer in the high desert of Northeastern CA year before last at 230 yds with this system. I practice a lot at 200yds, and feel comfortable shooting at that distance with this sighting system. It works for me. I have the same set-up on a Marlin 1895 45-70.