H.R. 631 — PARTS Act of 2025

This section revises the definition of “firearm silencer” and “firearm muffler” in 18 U.S.C. §921(a)(25) to mean (A) any device designed or redesigned, made or remade, and intended to silence, muffle, or diminish the report of a portable firearm and to be attached to such a firearm, directly or indirectly; or (B) the outer tube or other single part of any such device that provides the primary housing or structure for internal sound-reduction components and attaches to a portable firearm. (Thus, the revision excludes combinations of parts or components not constituting a complete attachable device or its primary housing.)