No. Firearm muffler or silencer parts transferred between qualified manufacturers for further manufacture or to complete new devices, and firearm muffler or silencer replacement parts transferred to qualified manufacturers or dealers to repair existing devices, need not be marked at the time of transfer. Any new device completed with such a part must be registered by the manufacturer. See 478.12(b). A subpart of a firearm muffler or silencer that is not a component part of a complete weapon at the time sold must be identified by an individual serial number.  See 478.92(a)(1)(iv).