At a LGS yesterday, I saw some Beretta handguns that were stainless steel?? and looked just like a 92 of some sort except the front sight was dovetailed in as was the rear sight.  Both sights could be drifted out.

What are these called?  How are they different??  I looked at the Variant thread above and they don't have any SS ones.

Yes, I know, I didn't pay any attention at the moment I saw them, moved on, and it only registered they were unusual on the drive home.

Are you talking about the Inox?

http://www.beretta.com/en-us/92-fs-inox/

Shinny, yes, top and bottom.  But the front sight was a dovetail night sight.

Found something on line called a BERETTA 92FS BRIGADIER INOX 9MM PISTOL.

I guess the bottom is aluminum?

It is a Brigadier slide. They made them for a little while and were on the Elite II series. I wish they had them for all models. The newer Beretta model coming out hopefully this year will have dovetail front sights. Frames are usually always aluminum unless you get a the Steel model, although they are harder to find then hen's teeth and cost as much.