Remix of Sulanix's GoPro 5 case. Scaled to fit better. I also added openings for the microphones on the camera.
Also the mounting holes most likely will need to be drilled out after printing with a 5mm or 13/64" drill bit.
Once tightened down in the clamp this case holds the camera pretty darn tight. Though not tight enough where it leaves marks on the camera.
4 Top and bottom
Printed in PETG for the flexibility of the material. PLA might work but may not flex enough to bend around the camera. So I'd suggest printing this in PETG, ABS, or Nylon.