II 115th CONGRESS 1st Session S. 533 IN THE SENATE OF THE UNITED STATES March 6, 2017 Mr. Nelson (for himself, Mr. Schumer , Mr. Blumenthal , Mrs. Feinstein , Mrs. Gillibrand , Mr. Markey , Mr. Menendez , Mr. Murphy , Mr. Reed , and Mr. Whitehouse ) introduced the following bill; which was read twice and referred to the Committee on the Judiciary A BILL To modernize the Undetectable Firearms Act of 1988.