LJ shouldnt go wrong with these cnc machines m8, if youve got some running on somthing like Kcad or somthing simular then you can see what its going to look like before you go ahead and do it.
use your cnc milling kit to make an aluminum mockup of the body you want cnc'd yourself.... then get a cnc type company to do that first.. there's your guarantee matey.
I did something similar a few years back for an air rifle part. As skeet says any commercial cnc fabrication type place will probably do it for ya. just inspect the blank afterwards really well ;-)