Well, that confirms it: It's die-cast pot metal (some alloy mixture of zinc, aluminum, lead, and perhaps some other impurities). Exactly as I'd predicted, it's not machined from steel.
Steel is not the only metal element on this planet...
In other words, the coating you have on there is NOT blued, and it's NOT parkerized. It's most likely powder coated (that's common with KWC's).