If your sole purpose in purchasing a gun or NFA trust is so you can buy that silencer and avoid the need for your local Chief Law Enforcement Officer’s (CLEO) signature*, then I’m not your guy. As I explain elsewhere on this site, I see gun trusts as accomplishing that purpose and much more, including encouraging safe and careful ownership of firearms for both you and those who inherit your firearms when you die, as well as helping you make sure that when you die, your guns go to whom you want, how you want, and when you want.
Gun law generally and the law governing NFA firearms more particularly are complex subjects. Persons who ask me to draft their gun trust will get more than a trust, they’ll also receive advice from me and substantial documentation on how to use that trust.
* This changes on Wednesday, July 13, 2016. After that, individuals no longer need a CLEO’s sign off on their NFA purchase, though they still need to notify the CLEO.