Deepends on how you want to portray your M715. If you want 1967 Veitnam, or CONUS then white with stars. If you want Germany 1967 then flat black...Don't know why it was different in Germany, but it was. I know a few guys who were over there before redeploying to nam and they too couldn't understand why europe was black and real war fighting was white...go figure.
If you want like brut4c said modern then flat paint and flat black markings.