+1. I went the same route with John. He helped encourage me to finish my project lower. And USAnodizing hardcoat was near perfect. If anyone needs engraving art, I made exact replicas of it, I would need a upper serial number (if yours has one) and type set the font for your lower to match numbers.If I had that nice MR556 lower, I would just have it redone to match a 416 lower. Then you have a real HK lower. Why would you use the precision lower? If you search around on here, there is at least one person I know that does a good job of engraving the auto markings. You could strip down the MR556 lower, then black anodize, then engrave the correct markings (I can send you a few references as well as the markings), then engrave the markings and other than the auto sear hole missing, it would look very close if not perfect.