They Can Not shorten the tube to less than what the length of the complete unit is listed on your Form 4 or Form 3. This would constitute "making a new suppressor" and you would have to get a new tube with a new serial number and pay another $200. If they did it, then the ATFness falls on them.
Just to keep everything on the level:
You can absolutely shorten a silencer, for the purpose of repairs. This is from the ATF's mouth, not mine. Increasing length would mean making a new silencer, not reducing.
Appendix B of the Handbook:
Q3: May the outer tube of a registered silencer be repaired due to damage? If so, may the repair
be done by someone other than the original manufacturer?
A damaged outer tube may be repaired by any Federal firearms licensee qualified to perform
gunsmithing or by the registered owner. The repair may not alter the dimensions or caliber of the
silencer, except that the length of the outer tube may be reduced
, as set forth above.
The repair may not be performed if it results in the removal, obliteration, or alteration of the serial number, as this would
I sit corrected! I guess if I had read my SOT and FFL manuals instead of getting opinions from three different NFA agents in DC who told me that I couldn't change the length at all I would not have responded wrongly. Thanks for the correction.
I still believe that AAC is wrong on the baffle issue. I can't find anything where they could not rebaffle or recore a suppressor.
Send it to someone else next time. I believe any SOT manufacturer can help do the job.
violate 18 U.S.C. § 922(k). In that case, the silencer may be returned to the registered owner in its
original, damaged condition or destroyed. A replacement silencer must be registered and transferred to
the registrant of the damaged silencer in the same manner as a new silencer, subject to the registration
and transfer procedures of the NFA and GCA.