I got back in town and was pleasantly surprised to see that my purchase authorization had come. I haven't had much time to research this (this week is busy) but I did take a few pictures. Bottom line - it seems unlikely that this barrel modification was performed by a factor or an armorer:
But I am still curious to figure out what I can. The extension and barrel match each other ('276) and this shows the 3 proof marks on the right side of the extension (which show obvious signs of refinishing):
There is one proof on the right side of the barrel, which has almost been obliterated by someone with a buffing wheel:
Bottom side:
And of course that crazy muzzle:
Note apparent index line on top:
Finally here are the proof marks visible on the front of the frame. Unlike the extension and barrel, the frame does not look refinished (except that some idiot put cold blue on the gun):
BTW am I correct that this suffix is "p"?
