I've wanted an Stgw-57 since the early 1980's. One of my grail guns.Hadn't seen that. I don't see any followup info on the linked pages, unfortunately. The AMT was always an object of desire for me, more so than the 57 only because of the chambering. A 57 in .308 is my boyhood dream fulfilled. If this thing goes into production, it'll float very near to the top of my "must buy" list.