Originally Posted by Fastbolt

FWIW, the hammers and triggers that looked like they were "stainless" were actually the older machined carbon steel parts that were flash-chromed. At some point you're going to "polish" through the chrome and reveal the "plain" carbon steel, so keep an eye out for oxidation.

The newer slide stop levers and manual safety assemblies were stainless MIM (according to what someone at the factory told me). He said they'd changed those from cast stainless to MIM stainless production at some point.

Don't be surprised if the "polished" appearance of those disparate parts and assemblies may not be exactly the same.