detail level of metal milling machines? used for making two part mold

I;m trying to make a metal mold of some warhammer products, due to thier extreme expense, and yes Iv'e checked every ip law and it's legal.  I want to know how fine detail wise milling machines can go?  Also where could I go to get a 3d scan of the sprue done.

The answer is very detailed, with exponentially rising cost. What are you going to cast the parts in?
Lucinator (author)  Tool Using Animal6 years ago
well I want to make molds, so metal in all likelihood.