My most recent project was to create a Ghost Glock17 from a Polymer80-80% lower, a lower parts kit, a slide. slide kit, barrel and recoil assembly. Now why would you want a Ghost Gun? Good question.
Ghost guns are "off-the-books" weapons, they don't have to be registered in most states and you build them yourself. My interest in hobby gun smithing was one reason for wanting to build a Glock from the ground up, heaven knows I have enough pistols as my wife will tell you, without adding another. With the up and down nature of gun registration, gun confiscation, gun control and the plethora of other threats to gun ownership, having a few Ghost Weapons stashed can be attractive. Let me tell you, you generally won't save a ton of money with a Ghost Gun unless you already have all the needed tools and expertise to build one.
I have modified Mausers and AK47's and done a few trigger jobs on various guns as well as done cold bluing, action bedding, scope mounting and assembled many AR15s some of them from 80% lowers. So I have many of the tools needed. The nice thing about the Ghost Glock is that the machining is minimal and it is done on polymer strengthened with fiberglass so no fancy CNC machines are required.
I have put together an overview of the entire project in Power Point and converted that to a PDF and you will find the link on the website http://survival.scubamage.com. The major lessons learned were:
1. It is better to machine less than more than you need
2. Q-bond repairs polymer nicely
3. The slide stop goes with the slot at the top facing backwards
4. Align the nub on the firing pin channel liner with the slot on the firing pin channel
5. Use a liner insertion tool
6. The connector goes inside the trigger bar on the trigger assembly
7. Many videos harp on polishing the front plastic slide rail area, when properly done, the slide actually rarely if ever contacts this area. Polishing the metal slides and properly routing out and finishing the rear slides is more important.
8. Be careful if you need to tap the trigger assembly into place, if the connector gets bent the slide will jam in place.
So, go ahead and look at the presentation and try to build your own.