What are the best arguments against anti-realism?

[Kaz1983]

After believing is moral nihilism for a year or so, I've starting to buy into minimal moral realism.

But, after learning about the companions in guilt argument, I've become more and more interested in finding the best argument against moral anti-realism. Personally I'm not sure and after I've done some looking into the companions in guilt argument, well I'm still just sure haha - jeez I'm curious what to make about of it... that is if anybody here can help me out, ohhhh well. See regardless of the time and whether or not the anti-realist.. but yeah, it can be really annoying but answer the question ffs...So yeah, what is the best argument anti-realism? I thought is was the companions in guilty argument but I'm starting to think it's something else.

So, does anybody else have any ideas, of what argument is the best?