That's if he can get the US to allow them to be imported as stand alone items (and yes I'm aware there is a lot involved on the US side of this equation as well).
But if they are not registered items in Europe/Germany why can't he mate them with a rifle over there? If I read you correctly, he cannot do that?
Or are you just speaking to export approval from Trade Ministry, which brings me to my first point? How would Germany ever know what he does with them once exported?
Just spit balling here not stiring the pot.
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