Splurge a little, cerakote a lot!
I've been searching for a place that did mill work for my guns and thankfully my friend James recommended Grant Defense. They are a manufacturer that recently opened in the middle of the year. From making their own AR's, super smooth custom drop-in triggers (for Glocks), to cerakote, mill work, and stippling for your firearms. They also carry ammo and other supplies for your toys.
I had the pleasure of doing business with Keil, who has had over 15 years experience in the industry. His knowledge helped me figure out what route to go with my future racegun. I'm fully satisfied with my purchase and will be back soon, but with more money Lol.
.001-.002 tolerance = perfectionism at its finest.