Yes it is. It was designed round-up for a very particular job using a technology illegal in the U.S. Your point?
My originally stated opinion remains.
You do know, that the FN5.7x28 as well as Ruger 5.7X28 can be purchased in the US, right?
So either the AAFES (Army Air Force Exchange Service) is selling illegal arms, and I am going to jail on a weapons charge, or your dining pleasure will be a flambe of crow
Or are you going to continue to be a pretentious ass?
And that is the point.