H.R. 631 – PARTS Act of 2025

AI-Generated Summary

Updated November 24, 2025 at 3:24 AM UTC

The PARTS Act of 2025 updates the legal definition of firearm silencers and mufflers in federal law. By clarifying what devices and components count as silencers, the bill affects how these items are regulated, impacting manufacturers, sellers, and owners of portable firearms.

Key Provisions

Amends 18 U.S.C. § 921(a)(25) to define “firearm silencer” and “firearm muffler” as any device designed, made, or modified to silence, muffle, or reduce the sound of a portable firearm and that can be attached directly or via a mount, adaptor, or other device.
Adds a second definition covering the outer tube or single part of a silencing device that houses internal sound‑reduction components and can also be attached to a portable firearm.

Legislative Activity

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1 earlier action

HouseIntro Referral Latest Action

Referred to the House Committee on the Judiciary.

Judiciary Committee

January 22, 2025

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HouseIntro Referral

Introduced in House

January 22, 2025

HouseIntro Referral

Referred to the House Committee on the Judiciary.

Judiciary Committee

January 22, 2025

Bill Text

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Introduced in HouseIssued January 22, 2025

I

119th CONGRESS

1st Session

H. R. 631

IN THE HOUSE OF REPRESENTATIVES

January 22, 2025

Mr. Pfluger (for himself, Mr. Golden of Maine, Mr. Cline, Mr. Ezell, Mr. Rulli, Mr. Babin, Ms. Tenney, Mr. Moore of West Virginia, Mr. Collins, and Mr. Bergman) introduced the following bill; which was referred to the Committee on the Judiciary

A BILL

To amend the definitions of firearm silencer and firearm muffler in section 921 of title 18, United States Code, and for other purposes.

1.

Short title

This Act may be cited as the Protecting Americans’ Right To Silence Act of 2025 or the PARTS Act of 2025.

2.

Firearm silencers and firearm mufflers

Section 921(a)(25) of title 18, United States Code, is amended to read as follows:

(25)

The terms firearm silencer and firearm muffler mean—

(A)

any device designed or redesigned, made or remade, and intended—

(i)

to silence, muffle, or diminish the auditory report of a portable firearm; and

(ii)

to be attached to a portable firearm, directly or through a mount, adaptor, or other device that is not a firearm silencer or firearm muffler; or

(B)

the outer tube or other single part of any device that—

(i)

provides the primary housing or is the primary structure for internal sound-reduction components designed or redesigned, made or remade, and intended to silence, muffle, or diminish the auditory report of a portable firearm; and

(ii)

attaches to a portable firearm, directly or through a mount, adaptor, or other device that is not a firearm silencer or firearm muffler.

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