This afternoon I picked up, at my LGS, a stripped 03A3 receiver that I had ordered from AIM Surplus. I plan to build it up into a proper 03A3 that I can shoot in the Springfield matches at Camp Perry. These are recovered from drill rifles there is a little mark on the lower front of the receiver where the weld was ground off.
It looks nice and should be a good place to start. It includes no parts other than the ejector and the extractor collar. The receiver has been re-parked while the R stamped bolt appears to be original, and was still covered in cosmoline.
As I make progress I will update add to the “03A3 Build” tag.