Don't kid yourself about "sophisticated machining" preventing China from producing it. China has very highly developed machining capabilities, anywhere they can build complicated injection molds they can easily build
any scuba gear.
The problem with counterfeiting is profound. Once a US company establishes manufacturing in china the injection molds, the CAD drawings, the fixtures etc are in china, usually in contract manufacturing plants that that are not under the control of the US companies.
Many of these contract manufacturing facilities are making "real" parts for the US companies first shift and making "counterfeit" parts for other private label users 2nd and 3rd shift so to speak.
Often there is no real difference between the two, same molds, same patterns etc., maybe a logo insert is changed in the molds.
China basically has no intellectual property rights laws.
I am involved in the injection molding industry. Another trend is the use of the same mold "2nd shift" but a cheaper resin.
One defense that US companies have been forced to use is the inclusion of "micro tags" in the approved and specified resins. These tiny tags have a specific series of colored bands unique to a particular resin or Company or part. The tags are mixed into the resin. Examination under a microscope can tell if the part was made using the resin specified.
The effects of "outsourcing" are profound. Companies loose control of their intellectual property rights, QC, Gray market, and become dependent on a long, and "twisty" supply chain.
Anything sold in high volume is a target for the knock off artists, that's why I build "tech" gear
Regards,
Tobin