ATF demonstration letter

[fox33c1]

Question,

What level of authorization is required to write an ATF demonstration letter for a manufacturer to procure class 3 NFA items. So they can show my detachment (possibly the S8 as well) improvements to an existing platform. Everyone I have asked has no idea and the ATF said any authorized person. (sounds like enough rope to hang yourself with)

They are not bolting a damn thing to any issued equipment, but I will watch them do what ever to their stuff.

Thanks