I 119th CONGRESS 1st Session H. R. 4257 IN THE HOUSE OF REPRESENTATIVES June 30, 2025 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 certain semiautomatic weapons, and for other purposes.

1. Short title This Act may be cited as the End Domestic Terrorism Act . 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 incident using a machinegun, a destructive device, or a covered semiautomatic weapon in a circumstance described in subsection (b) and at a location described in subsection (c), 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 offense. (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 another 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. (5) The offense otherwise occurred in or affected interstate or foreign commerce. (c) A location described in this subsection is any one of the following: (1) A school or location of a school-sponsored activity or organization. (2) A place of worship. (3) A medical facility or care facility. (4) A childcare facility. (5) A government building, including a Federal building, a municipal building, and a courthouse, or a voting location. (6) An entertainment or educational venue or facility, including a concert venue, a professional sporting event, a museum, a library, a movie theater, a theater venue, an arcade, a bowling alley, or an amusement park. (7) A scheduled public event, such as a parade, a ceremony, or a race. (8) A retail location, including a mall, a grocery store, a convenience store, a bar, or a restaurant. (9) An office building. . (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 otherwise enhances the concealability, of the weapon; (IV) a grenade launcher; (V) a barrel shroud; or (VI) a threaded barrel; (B) a semiautomatic rifle that has a fixed magazine with the capacity to accept more than 10 rounds, except for an attached tubular device designed to accept, and capable of operating only with, .22 caliber rimfire ammunition; (C) any part, combination of parts, component, device, attachment, or accessory that is designed or functions to accelerate the rate of fire of a semiautomatic firearm but not convert the semiautomatic firearm into a machinegun; (D) a semiautomatic shotgun that— (i) has the capacity to utilize a magazine that is not a fixed magazine; and (ii) does have any one of— (I) a folding, telescoping, or detachable stock; (II) a pistol grip or bird's head grip; (III) a fixed magazine with the capacity to accept more than 5 rounds; (IV) the ability to accept a detachable magazine; (V) a forward grip; or (VI) a grenade launcher; (E) any AK or AR type of weapon, including a rifle, copy, duplicate, variant, or altered facsimile with the capability of any such weapon; and (F) any weapon that is substantially similar to a weapon described in subparagraphs (A) through (E) determined by the Attorney General pursuant to a rule, which shall be made on the record after opportunity for a hearing pursuant to the rulemaking procedures prescribed by subchapter II of chapter 5 of title 5; (8) the term machinegun has the meaning given such term in section 5845(b) of the Internal Revenue Code of 1986; and (9) the term destructive device has the meaning given such term in section 921. . (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. . 3. Report on charges filed for use of weapons of mass destruction and providing material support to terrorists On the date that is one year after the date of enactment 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 section 2332j of title 18, United States Code, were filed— (A) the date of the alleged offense; (B) the number of individuals who were injured; (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 section 2339a of title 18, United States Code, were filed— (A) the type of support alleged to have been provided; (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. 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 nationality of each individual arrested, . 5. Public reporting requirement Not later than 180 days after the Department of Justice files charges under section 2332j of title 18, United States Code, the Attorney General shall make publicly available on the website of the Department of Justice a report, which shall include the following: (1) The number of individuals present at the location of the offense. (2) Total amount expended by Federal, State, and local governments in response to the offense, including law enforcement response, reimbursement for medical expenses, the provision of mental health services, and support provided to affected businesses. (3) Total amount of lost business revenue as a result of the offense. (4) The total amount of assistance provided as a result of the offense through compensation and assistance programs, such as the Crime Victims Fund.