So I'm new to handguns, went hunting with my grandfather's old rifles and shotguns growing up. I just bought my first handgun, the 9mm Shield. The finish says Black 68 HRc. I read that this is a measurement of the hardness and I think they were saying the material was melonite. I just wanted to know if I could get some more details on what this Black 68 HRc means. If it's the hardeness, how does it compare to others?