This months riflemagazine has some closeup pictures of it. It is a HOWA action that has been scalloped, the bolt shroud is custom. Bolt is all Howa as well. Howa action is one of the few actions left in this world that are drop forged and then machined. The entire bolt is one piece.The bottom metal is custom(probably sunnyhill) and the barrel is unknown origin as is the stock. The stock though looks like one out of a NULA but with a floorplate which would explain the light weight of the rifle. Bill Wiseman in Texas I am betting has something to do with this rifle since he is a big proponent of HOWA custom rifles and makes some great barrels and custom rifles.
That was my quote last time I posted on this. I have since found out that it is a custom casting done somewhere in the US. The giveaway is the bolt release which that is not a bolt release area on a HOwa/Vanguard receiver. Everything else is pretty much what I said.