HR631-119

What This Bill Does

The PARTS Act amends 18 U.S.C. 921(a)(25). A firearm silencer or muffler would mean a device designed and intended to diminish the sound of a portable firearm and attach to that firearm, or the outer tube or other single part that provides the primary housing for internal sound-reduction components and attaches to a firearm. The revised definition specifies that mounts, adaptors, or other devices that are not themselves silencers or mufflers are outside the definition.

Who Benefits and How

Firearm accessory manufacturers, gunsmiths, firearm owners, and retailers benefit from a narrower definition that may reduce National Firearms Act or Gun Control Act treatment for mounts, adapters, and non-housing parts. ATF-regulated businesses gain clearer statutory language about which parts are treated as silencers.

Who Bears the Burden and How

ATF and DOJ must update enforcement guidance and classification practices. Gun-control advocates and law-enforcement groups may view the narrower definition as increasing risk if more silencer-related parts circulate outside current controls. Prosecutors may have to prove that a part is the outer tube or primary housing rather than an accessory.

Key Provisions

• Amends the Federal definition of firearm silencer and firearm muffler.
• Limits covered devices to sound-suppressing devices intended to attach to portable firearms.
• Limits covered parts to the outer tube or primary housing for internal sound-reduction components.
• Excludes mounts, adapters, and other devices that are not themselves firearm silencers or mufflers.