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

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..