I 
119TH CONGRESS 
1ST SESSION H. R. 2799 
To amend title 18, United States Code, to prohibit machinegun conversion 
devices and illegal modifications of semiautomatic firearms, and for other 
purposes. 
IN THE HOUSE OF REPRESENTATIVES 
APRIL 9, 2025 
Ms. TITUS (for herself and Mr. FITZPATRICK) introduced the following bill; 
which was referred to the Committee on the Judiciary, and in addition 
to the Committee on Ways and Means, for a period to be subsequently 
determined by the Speaker, in each case for consideration of such provi-
sions as fall within the jurisdiction of the committee concerned 
A BILL 
To amend title 18, United States Code, to prohibit machine-
gun conversion devices and illegal modifications of semi-
automatic firearms, and for other purposes. 
Be it enacted by the Senate and House of Representa-
tives of the United States of America in Congress assembled, 
SECTION 1. SHORT TITLE. 
This Act may be cited as the ‘‘Closing the Bump 
Stock Loophole Act of 2025’’. 
SEC. 2. PROHIBITION. 
(a) IN GENERAL.—Chapter 44 of title 18, United 
States Code, is amended— 
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(1) in section 921(a), by inserting after para-
graph (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 semi-automatic fire-
arm the device— 
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‘‘(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 semi-automatic 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 semi-automatic 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 sub-
section, any person who lawfully owns or possesses a semi- 
automatic firearm that was modified as described in para-
graph (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, 
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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 semi-automatic firearm de-
scribed 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 de-
vice’’ and inserting ‘‘(8) a destructive device; and (9) a 
semi-automatic 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’’. 
Æ 
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