Using a Gun Trust for multiple people is a common scenario that we discuss with people. Our general recommendation is that it is not a good idea to have several people contribute firearms to a single trust for the purpose of sharing ownership and use of the firearms.
While it is not such a bad idea, if people are going to be contributing firearms to your trust, most people want to use a trust like a company where each person will have equal rights. The equal rights scenario is a generally a bad idea because your gun do not necessarily go to who you want.
Imagine the following example. Adam, Burt, and Charlie want to form a trust so that they can each use all the firearms in a single Gun Trust. Adam is married and has children, Burt is single, and Charlie has a live in girlfriend. Each is planning on purchasing a silencer so that there will be three silencers to share. It would be important to add Adam’s wife and Charlie’s girlfriend on the trust to protect them from constructive possession and inadvertent transfers which are both violations of the NFA and have penalties that can include 10 years in jail and a 250,000 penalty.