Primary Machine did both my CZ's (for RMRs) and I got them back in just over a week. I'd put them in the mail on a Tuesday and get them back 7 or 8 days later. I sent the RMRs with them and they even mounted the RMRs, as well as machining for the taller rear sight, installing tall front/rear sights and refinishing the slides (cerakote).
Very happy with the work, the cost, the turn around time. Talk to them.