This receiver was ordered direct from DS Arms May 2, 2017 and delivered to the FFL on May 12, 2017. The delivery was delayed because of an administrative error at DS Arms, but once rectified, the delivery was swift. It appears to be a cast receiver.
Hand timed barrels:
Argentine Non Bipod Cut barrel
Argentine Bipod cut barrel
IMBEL Non Bipod cut barrel
Austrian StG58 (StLf3)
StG58 barrel shoulder trimmed on the lathe
Proper hand time achieved
Barrel torqued to TDC. Locking shoulder size needed is .257. All of mine are larger, so I will set my smallest in the mill and cut it to size this week end.
I test fit all of the other components and everything fit and functioned properly. So far, I am pleased with this receiver.
More pics and range report if interest warrants.
ETA: I just realized that the 3rd and 4th pics are actually barrels timed to an IMBEL receiver stub. The information is still relevant because each barrel timed on the stub exactly as it had on the DS Arms receiver. If Photobucket were not such a pain in the anus to use, I would switch the pics. I'll add the proper pics when I update the thread with the pics of the refinish and final assembly.