This may be old news to some, but I know online in many various groups there has been discussion about U.S. vs Czech-made pistols, specifically the P-10 line. I recently placed an order for a P-10C and called Grabagun to determine if they knew if the specific pistol I would receive would be U.S. or Czech-produced. They suggested I call CZ USA and inquire. The rep at CZ USA indicated that U.S. production was shut down two years ago at the time CZ and Colt came together, so any pistols "in the system" would almost certainly be Czech produced (especially from high-volume dealers like Grabagun). I can't verify this beyond what I was told by CZ USA.
Again, this may be old news to many of you, but I just thought I'd share.