Hanover Armory does awesome work at decent prices. I had a barrel threaded there and muzzle brake mounted with about a week turn around time. GOOD LUCK
I used Duffy's and am very happy with the results. Price was reasonable and would be slightly cheaper than or comparable to ADCO without the shipping hassle. The one downside is that it took a few weeks because they are usually pretty booked up with gunsmithing work.
But they always seem to be a bit of a wait (which means they are keeping people happy).
For faster work, send it out.
I have had 1 week door to door service with both Short Action Customs (thread, crown, install and time muzzle brake, Cerakote) and Long Rifles Inc (thread, make thread protector, Cerakote entire barrel).