Funny, I had an G 17 converted to an open gun some time ago, not the best choice to compete with it considering the fine open guns available now days but if you really have made up your mind here is my contribution with regard to what is need it and where you may get it.
• 9mm lone wolf threaded barrel { any dealer can order one for you I order mine from the local gun shop and it came in 3 weeks time }
• 3.5 lb disconector and some springs to tune up you action { same local shop }
• Cmore scope mounts and comp . { I use Carver custom parts } I suggest you decide the comp after you purchase the barrel so you know the thread on the barrel and then buy the comp accordingly.
• Magazine well { again it came from Carver it may need some fitting }
• Magazine bumpers , once you have a mag well the original magazines will be to short so you will need them in order to be able to reload { I used Arredondo magazine bumpers }
• Obviously the CMore red dot {I got one from Freedom Venture in less than one week time }
• Holster { Carver modifies the CR holsters to fit his mounts , hey I may still have mine somewhere ,have to look for it }
• Slide racker { which is an modified back plate with an knob attached to it { can’t remember how I found that one }
• I also got a steel guide rod and an non captured spring {don’t remember from who ether }.
The gun and parts where sold long ago but I still had this picture on my photobucket account. Well good luck with your project and enjoy the pictures.