I just got off the phone with SA, and was enlightened to the 100th power. The Black Stainless finish is a two step process in which the metal is first anodized with zinc carbide which leaves it sort of a gray/green color, and then is treated to an acid bath which hardens the finish and turns it black. Also, banjold7, the nm in front of the serial number merely signifies the production group that put the pistol together. According to SA S/Ns can begin with n, m, nm, mn, or s. The nm does not signify National Match as is rumored. Well, now we're all smarter.
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