Do any of you know who offers the best service for milling a factory slide, for a red dot sight? I've found a couple of places online that advertise $100 for the service.
I know this isn't what you asked, but... I opted for the Outer Impact on my 17L. I can mount any red dot on it and it isn't permanent. Another plus is no wait time. I've used this for over a year with my Venom with zero trouble. I shoot the gun weekly and at the GSSF indoor matches, so no telling how many rounds.
Used lone wolf distributers for vortex viper cut on a glock 19. They cut in a sight dovetail ahead of the red dot. Also mounted suppressor height night sights that cowitness perfectly. Then refinished with cerakote. Price was fair, so was their turnaround time.
Battlewerx did my G35.
I chose the RMR as it's shorter and allows the co-witness rear to remain in it's normal spot.
They did perfect work, quick turnaround.
Had them nitride the slide afterwards.
Lots of good info on their site.