II 116th CONGRESS 1st Session S. 459 IN THE SENATE OF THE UNITED STATES February 12, 2019 Mr. Menendez (for himself, Mr. Murphy , Mr. Markey , Mrs. Feinstein , and Mr. Cardin ) introduced the following bill; which was read twice and referred to the Committee on Foreign Relations A BILL To protect the American people from undetectable ghost guns, and for other purposes.