So I wanted to get a Trijicon RMR mounted on my Glock 17... There are some amazing companies doing incredible work out there, but most of them are either out of my price range, or the lead time is measured in months it seems. So in checking around the internet I found two articles on rifleshooter.com
One article was about how to machine a Glock slide for a Trijicon RMR and the other article was about how to machine cocking serrations. Well, I am not a machinist, but I do know one. So I showed him the articles and asked if he could do it. He said, "Sure." (He made parts for the Mars Rover) So a week or so later I had my newly machined slide in hand for $200.
I just went and zeroed it yesterday and got a chance to put some rounds through it. Lots of fun so far...
Here is a link to the two articles as well as a video I posted showing the slide and talking about the process: https://kitbadger.com/slide-modification/
If you are going down the road for some slide work, check locally, you might be surprised.