Tactical Innovations offers these and prices them but clearly states that one must return the suppressor for repair
http://www.tacticalinc.com/replacement- ... 1_757.html
This letter from 2006 on the first page of the ARFCOM thread shows that ATF classifies baffles and end caps as silencers. On page two is reads that component parts of a silencer are silencers themselves and must be registered.
http://www.ar15.com/archive/topic.html? ... 0&t=242056
Perhaps someone can direct me to a new ruling from the ATF that says spare parts are indeed legal for unlicensed individuals to own?
Manufacturers that mark end caps with the serial number/other required information and then claim that if your tube is destroyed it can then be easily replaced because the registered part is unharmed is false. While its legal to mark the end cap, replacing the tube requires a new transfer tax as per ATF.
The term “repair” does not include replacement of the outer tube of the silencer. The outer tube is the largest single part of the silencer, the main structural component of the silencer, and is the part to which all other component parts are attached. The replacement of the outer tube is so significant an event that it amounts to the “making” of a new silencer. As such, the new silencer must be marked, registered and transferred in accordance with the NFA and GCA.