Not an atty so I may be missing the facts but, if you are the primary trust dude, and you die, I think you can transfer the trust to another primary dude (as it was not expected). That would be the whole idea of a trust.
Googled "Revokable Living Trust" and this was the first listing...
A revocable living trusts is a popular estate planning tool that you can use to determine who will get your property when you die. Most living trusts are “revocable” because you can change them as your circumstances or wishes change. Revocable living trusts are “living” because you make them during your lifetime.
If you own NFA items (individually owned, not a trust) and you die, your heir, or whoever you leave your NFA items to, can transfer ownership to themselves via the Form 5, tax free.