Yeah, I discussed it with the attorney who drew up my trust. However, I didn't have any reason to ask that question.
In my initial planning stages the most obvious beneficiary (most likely to still be alive etc) was a prohibited person (e.g. a 3 year old) so my initial questions surrounded making sure that I wouldn't create accidental felons by dying before plan. Then as I understood more about "doctrine of merger" and what trustees can do in the name of the trust it made more sense (to me) to name what I think of as a a "safety" beneficiary that I'm happy with receiving the value of trust property after liquidation but I don't want to be able to possess. If, upon reaching legal age, the person I first considered as beneficiary is interested in trust property she can be added as a trustee.
However, now I'm curious. If you named the NRA as the beneficiary of your trust could all NRA members, or employees, or officers, or anyone at the NRA legally possess NFA property of your trust?