BUMP Act

[Congressional Bills 119th Congress]
[From the U.S. Government Publishing Office]
[S. 1374 Introduced in Senate (IS)]

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119th CONGRESS
  1st Session
                                S. 1374

     To amend title 18, United States Code, to prohibit machinegun 
conversion devices and illegal modifications of semiautomatic firearms, 
                        and for other purposes.


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                   IN THE SENATE OF THE UNITED STATES

                             April 9, 2025

 Mr. Heinrich (for himself, Ms. Collins, Ms. Cortez Masto, Ms. Rosen, 
   Mr. Fetterman, Mr. Coons, Ms. Klobuchar, Mr. Kaine, Mr. Reed, Mr. 
Whitehouse, Mr. Blumenthal, Mr. Durbin, Mrs. Shaheen, Mr. Padilla, Ms. 
Smith, Mr. King, Mr. Kelly, Mr. Bennet, Ms. Duckworth, Mr. Markey, Mr. 
   Van Hollen, Mr. Sanders, Mrs. Murray, Mr. Wyden, Mr. Booker, Ms. 
Hirono, Mr. Welch, and Mr. Schiff) introduced the following bill; which 
     was read twice and referred to the Committee on the Judiciary

_______________________________________________________________________

                                 A BILL


 
     To amend title 18, United States Code, to prohibit machinegun 
conversion devices and illegal modifications of semiautomatic firearms, 
                        and for other purposes.

    Be it enacted by the Senate and House of Representatives of the 
United States of America in Congress assembled,

SECTION 1. SHORT TITLE.

    This Act may be cited as the ``Banning Unlawful Machinegun Parts 
Act'' or the ``BUMP Act''.

SEC. 2. PROHIBITION.

    (a) In General.--Chapter 44 of title 18, United States Code, is 
amended--
            (1) in section 921(a), by inserting after paragraph (30) 
        the following:
    ``(31) The term `semiautomatic firearm' means any firearm that--
            ``(A) upon initiating the firing sequence, fires the first 
        chambered cartridge and uses a portion of the energy of the 
        firing cartridge to--
                    ``(i) extract the expended cartridge case;
                    ``(ii) chamber the next round; and
                    ``(iii) prepare the firing mechanism to fire again;
            ``(B) requires a separate pull, release, push, or 
        initiation of the trigger to fire each cartridge; and
            ``(C) is not a machinegun.'';
            (2) in section 922, by inserting after subsection (u) the 
        following:
    ``(v)(1) Except as provided in paragraphs (3) and (4), on and after 
the date that is 120 days after the date of enactment of this 
subsection, it shall be unlawful for any person to import, sell, 
manufacture, transfer, receive, or possess, in or affecting interstate 
or foreign commerce--
            ``(A) any manual, power-driven, or electronic device 
        primarily designed, or redesigned, so that when the device is 
        attached to a semiautomatic firearm the device--
                    ``(i) materially increases the rate of fire of the 
                firearm; or
                    ``(ii) approximates the action or rate of fire of a 
                machinegun;
            ``(B) any device, part, or combination of parts, that is 
        designed or functions to materially increase the rate of fire 
        of a firearm, by eliminating the need for the operator of the 
        firearm to make a separate movement for each individual 
        function of the trigger; or
            ``(C) a semiautomatic firearm that has been modified in any 
        way that--
                    ``(i) materially increases the rate of fire of the 
                firearm; or
                    ``(ii) approximates the action or rate of fire of a 
                machinegun.
    ``(2) Except as provided in paragraph (3), not later than 120 days 
after the date of enactment of this subsection, any person who lawfully 
owns or possesses a semiautomatic firearm that was modified as 
described in paragraph (1)(C) before such date of enactment shall 
register the semiautomatic firearm in accordance with section 5841 of 
the Internal Revenue Code of 1986.
    ``(3) This subsection does not apply with respect to the 
importation for, manufacture for, sale to, transfer to, or possession 
by or under the authority of, the United States or any department or 
agency thereof or a State or Tribe, or a department, agency, or 
political subdivision thereof.
    ``(4) Paragraph (1) shall not apply to any lawful transfer or 
possession of a semiautomatic firearm described in paragraph (1)(C) 
that--
            ``(A) was lawfully modified and possessed before the date 
        of enactment of this subsection; and
            ``(B) is registered in accordance with paragraph (2).''; 
        and
            (3) in section 924(a)(2), by striking ``, or (o)'' and 
        inserting ``(o), or (v)''.
    (b) Amendment to the National Firearms Act.--Section 5845(a) of the 
Internal Revenue Code of 1986 is amended by striking ``and (8) a 
destructive device'' and inserting ``(8) a destructive device; and (9) 
a semiautomatic firearm, as defined in section 921 of title 18, United 
States Code, that is modified as described in section 922(v)(1)(C) of 
such title''.
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