She has now been charged with "knowingly and intentionally" trying to export "defence articles on the United States Munitions list" and could face up to ten years in jail when she appears in court this summer. She is under house arrest and her passport has been confiscated.
Scott Palmer, her lawyer said the case "looks a lot worse than it really is," and that all her purchases had been legal.
He said: "There's no terrorism link. There's no espionage."
Ms Fermanova, a communications student at the University of Phoenix, moved with her Jewish family to Dallas when she was nine.
Her looks have led to comparisons with redheaded Russian spy Anna Chapman, who was among the nine people from suburban America arrested in June.