The flimsy part I don't know about. How about using some Locktite on threads, etc. Most who complain about the Mini 14 rear site are actually complaining about the inability to see through the small peephole. Remove the sight plate (2 small screws, anchor it in a vise, and drill out the peep to double or tripple its factory size. Use the large peep on an AR 15 for a good guide to useable hole size.