I'm trying to help guys get started in this hobby (Or obsession) and am passing on some experience to ease the learning curve. I've done flats, sheet metal, and commercial receiver builds and don't think that there currently is a better, more accurate product than what Global offers. There are other quality commercial receivers, but Globals seems to have fewer com-promises re: pre-drilled trunnion holes, selector height, rail alignment, heat treating, etc. On the more recent 1mm product, there is a secondary bend on the upper rail, similar to that seen on the European receivers. This is a great feature not seen on many other receivers. RTC