Looking pretty manly to me. Depending on it's size. Any slings over 2 inches start getting more of the high contrast colorations. The subdued abdomen coloration is an indicator and the purple coloration as they near adulthood. Male subfuscas can mature out at as small as 3 inches. Take a look at the pedipalps.
Yes, looks like a male in ultimate instar to me at that angle.
Take a better pic of the palp tips just to be sure, now that I look at it better.
If it's a male, consider sending it to my brother Jack (Haploman here at Arachnopets). He has a pretty big female that had a recent molt.