Here are some photos of the welds from my June purchased RS.
I didn't take any photos of the internal receiver or the bolt taken down. Everything checks out, very little red/orange brazing on my sample except in the butt cap. Other than being dirty, covered in oil/grease, and the above paint issue, this gun is great looking. (this is my first roller delayed, so this is the first time I have inspected one or torn one down)
I can also confirm the bolt, bolt carrier, and locking piece have 3 digit serials that match the frame. 3 lug is correctly timed. It feeds, extracts, and ejects the 5 beat up snap caps I have as well with all 3 MKE mags.