Title says it all. I assume that there is not one answer but that it includes inspecting the handgun and making adjustments & repairs as necessary. Still, there have to be certain standards, right?  So, my questions are:

1. What specifications must a used Sig handgun meet in order to be resold as an "official" Sig refurb?

1a. Are there any parts that are automatically replaced, i.e. the barrel, as part of a refurb?

2. Does anyone here have experience with Sig refurbs and, if so, would you recommend a Sig refurb?

Thanks in advance!

I can't answer about the standards involved but I can tell you that I bought a P229 refurbished in the red box and it looked like new and functions perfectly.

This. My P220 was the same, and turned out to be a German made piece with the rolled carbon steel slide and internal extractor.

Springs and pins get replaced.

Bought a P226 in .40 cal in the red box. Looked like it was brand new and has been flawless. One year warranty. The mags were stamped saying they were for law enforcement or military only. I recently added another barrel in .357 Sig so I have two choices in ammo now. Barrel is a direct drop in and uses the same magazines as the .40. I have never been sorry I spent the money, especially when I got it about 60% of list.

Refurb SIG's are awesome. I wont waste any extra money on a new 226 or 229 again. Anodizing on rails is good, New springs, new barrel if needed. They are a good deal.

Fantastic--thanks all!