US has some odd federal barrel restrictions, too.
No smoothbore pistols, nothing smooth under 18", or under 16" if rifled.
No shorty ARs for Americans. Unless they are SBR federally registered and taxed.
The TNW PPSh with the extended barrel jacket and long barrel looks odd. Don't know if it has an all new receiver; if any old receiver bits are recycled, it won't pass here.
To sell any of these guns in the US, they have to have enough US made parts to qualify under US law.