I 
118TH CONGRESS 
1ST SESSION H. R. 4347 
To amend title 18, United States Code, to provide increased penalties for 
mass killings involving machineguns or certain semiautomatic weapons, 
and for other purposes. 
IN THE HOUSE OF REPRESENTATIVES 
JUNE 23, 2023 
Mr. MOULTON (for himself and Ms. ESCOBAR) introduced the following bill; 
which was referred to the Committee on the Judiciary 
A BILL 
To amend title 18, United States Code, to provide increased 
penalties for mass killings involving machineguns or cer-
tain semiautomatic weapons, 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 ‘‘Mass Shooter Prosecu-
tion Act of 2023’’. 
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SEC. 2. MASS KILLINGS USING MACHINEGUNS OR COVERED 
SEMIAUTOMATIC WEAPONS. 
(a) IN GENERAL.—Chapter 113B of title 18, United 
States Code, is amended by inserting after section 2332i 
the following: 
‘‘§ 2332j. Mass killings using machineguns or covered 
semiautomatic weapons 
‘‘(a) Whoever kills 3 or more people in a single inci-
dent using a machinegun or a covered semiautomatic 
weapon in a circumstance described in subsection (b), 
shall be imprisoned for any term of years or for life. 
‘‘(b) A circumstance described in this subsection is 
any one of the following: 
‘‘(1) The mail or any facility of interstate or 
foreign commerce was used in furtherance of the of-
fense. 
‘‘(2) The machinegun or covered semiautomatic 
weapon used in the commission of the offense was 
transported in interstate or foreign commerce. 
‘‘(3) The perpetrator traveled in or caused an-
other to travel in interstate or foreign commerce in 
furtherance of the offense. 
‘‘(4) The offense occurred within the special 
maritime and territorial jurisdiction of the United 
States. 
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‘‘(5) The offense otherwise occurred in or af-
fected interstate or foreign commerce.’’. 
(b) DEFINITION.—Section 2331 of chapter 113B is 
amended— 
(1) in paragraph (5), by striking ‘‘and’’ at the 
end; 
(2) in paragraph (6), by striking the period at 
the end and inserting a semicolon; and 
(3) by adding at the end the following: 
‘‘(7) the term ‘covered semiautomatic weapon’ 
means— 
‘‘(A) semiautomatic rifle that— 
‘‘(i) has a magazine that is not a fixed 
magazine; and 
‘‘(ii) does have any one of— 
‘‘(I) a pistol grip; 
‘‘(II) a forward grip; 
‘‘(III) a folding, telescoping, or 
detachable stock, or is otherwise 
foldable or adjustable in a manner 
that operates to reduce the length, 
size, or any other dimension, or other-
wise enhances the concealability, of 
the weapon; 
‘‘(IV) a grenade launcher; 
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‘‘(V) a forward grip; or 
‘‘(VI) a grenade launcher; 
‘‘(E) any AK or AR type of weapon, in-
cluding a rifle, copy, duplicate, variant, or al-
tered facsimile with the capability of any such 
weapon; or 
‘‘(F) any weapon that is substantially simi-
lar to a weapon described in subparagraphs (A) 
through (E) determined by the Attorney Gen-
eral pursuant to a rule, which shall be made on 
the record after opportunity for a hearing pur-
suant to the rulemaking procedures prescribed 
by subchapter II of chapter 5 of title 5; and 
‘‘(8) the term ‘machinegun’ has the meaning 
given such term in section 5845(b) of the Internal 
Revenue Code of 1986.’’. 
(c) 
PROVIDING
MATERIAL
SUPPORT.—Section 
2339A(a) of title 18, United States Code, is amended by 
inserting after ‘‘2332f,’’ the following: ‘‘2332j,’’. 
(d) CLERICAL AMENDMENT.—The table of sections 
for chapter 113B of title 18, United States Code, is 
amended by inserting after the item related to section 
2332i the following: 
‘‘2332j. Mass killings using machineguns or covered semiautomatic weapons.’’. 
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SEC. 3. REPORT ON CHARGES FILED FOR USE OF WEAPONS 
OF MASS DESTRUCTION AND PROVIDING MA-
TERIAL SUPPORT TO TERRORISTS. 
On the date that is one year after the date of enact-
ment of this Act, and annually thereafter, the Attorney 
General shall submit to Congress a report on each case 
in which the Department of Justice has filed charges 
under section 2332j or 2339a of title 18, United States 
Code, during the previous year, which shall include the 
following: 
(1) For each case in which charges under sec-
tion 2332j of title 18, United States Code, were 
filed— 
(A) the date of the alleged offense; 
(B) the number of individuals who were in-
jured; 
(C) the number of fatalities; 
(D) the age, gender, race, ethnicity, and 
nationality of each individual charged under 
such section; and 
(E) the weapon used in the alleged offense. 
(2) For each case in which charges under sec-
tion 2339a of title 18, United States Code, were 
filed— 
(A) the type of support alleged to have 
been provided; 
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(B) to whom such support was alleged to 
have been provided; and 
(C) the age, gender, race, ethnicity, and 
nationality of each individual charged under 
such section. 
SEC. 4. INCLUSION OF DEMOGRAPHIC INFORMATION IN 
REPORTS CONCERNING INTERCEPTED WIRE, 
ORAL, OR ELECTRONIC COMMUNICATIONS. 
Section 2519(2)(c) of title 18, United States Code, 
is amended by inserting after ‘‘order or extension,’’ the 
following: ‘‘, the age, gender, race, ethnicity, and nation-
ality of each individual arrested,’’. 
Æ 
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