Originally Posted by jcurt455
The terms “firearm silencer” and “firearm muffler” mean any device for silencing, muffling, or diminishing the report of a portable firearm, including any combination of parts, designed or redesigned, and intended for use in assembling or fabricating a firearm silencer or firearm muffler, and any part intended only for use in such assembly or fabrication.
Straight from the ATF website. You actually have to read it a couple of times. But pay attention to intended.
That is from a ruling regarding a silencer welded to a barrel that was welded to a paintball gun. Further down it goes into cutting the silencer from the barrel. "Because the device will no longer be permanently attached to an unregulated item, and because of its silencer design characteristics, removal will result in the making of a silencer under the NFA and GCA." https://www.atf.gov/regulations-rulin...ing-2005-4.pdf