I knew this would happen with 3D printing eventually:

From the description:

The final iteration of the 3D printed Banana Standard pistol is now fully functional. All major controls work perfectly, and all minor tolerances have been corrected. The only issue seems to be that the slide, in conjunction with the recoil spring, are too heavy to cycle properly with a suppressor attached. The frame was printed in PLA at 0.1mm layer heights.

Incredible.  According to the comments on the video, he even 3d printed the frame rails in 17-4 stainless steel.  As you know, the frame is the part with the serial number on it, so he’s making what the internet likes to call a “GHOST GUN”👻👻👻.  Although he could have used a Glock slide, he chose to use some aftermarket one in the videos.  The guy hasn’t made any comments on the long term durability of the PLA.

This is an older version posted last week, where he had some fun with the frame shape:

The guy also 3d printed a VZ61 Skorpion, from measurements he took off a de-milled parts kit and some old blueprints.

Oh man the aftermarket is going to have a field day once this becomes easier and easier to do at home, and the files become open source.  Naturally the lawmakers will be scrambling even more than they are now.