Yes, eventually. You cannot PCS with them though.
You have to get a German gun licence FIRST, then can apply to import your stuff from the States.
If you go to a large installation, you can go through the American gunclub, so its not too bad..
Honestly though, its more of a PITA then its worth; Going to a German civilian range is boring. Fixed distance, prone/bench, bullseye targets, etc..
ARs are legal (though you will be exempt anyways).
I was there from 98-07.