Wow, I was not aware of this. No reason why Springfield Armory can't design, engineer, and manufacture it here in the US.People keep asking why XD and others aren't making a .22 pistol.
Here's a link discussing the point system involved for importing a handgun: NRA-ILA | Federal Handgun Importation Criteria
The gist of the matter, the smaller caliber gives less points. Non metal frames really hits the points requirements. Fixed sights knock off points.
It's all to keep the children safe.