My newest build is a straight target match gun. My son and I shoot 200 offhand frequently, I built my upper already with a 22" Krieger barrel and broke it in and its a great shooter. I'm looking to see what people are using for peep/ aperture sights for a flat top AR. I'm not quite ready to drop $400.00+ each for micrometer style sights. I know "precision costs $" but for the time being I just don't have the money. Any ideas on "reasonable" sight set ups? Or pics of what you use? Where to get them? Maybe a decent used set? Thanks for your help.