I have a couple these in the 4-12x40 fixed half mildot format, while i agree they are exceptional for the price i have spotted a flaw, the turret caps do not tighten down onto the rubber sealing washers, infact if they are tighened down a little too much when they are undone they turn the adjusters, make a note of where they are set and try it! I cured this by putting a 22x1mm o ring over the threads of each turret, the caps now seal on these before touching the adjusters.