Meta Quest 2 controller, right, should be very accurate due to scan source
Finally I was able to get accurate scan data for Quest2 controller (units are in meters btw for old Sketchup compatibility, so import as mm). Used for custom grip I designed and printed, so confirmed the accuracy. The orientation is original, provided by Oculus Dev 3D model (but the model itself there is NOT accurate in dimensions). So, if you will align the gun bore making your pistol grip in parallel with X axis - you should be good with accurate grip. In games it's usually 6-8 degrees pitch, depending on real gun model you're trying to mimic.