Iāve never been checked for my stamps. Ever.
But, I believe you need to be with the can. He can use it, you just have to be there.
2 second google searchā¦..
āNo, you cannot simply "loan" a suppressor, as the
National Firearms Act (NFA) requires the registered owner to maintain possession or be in physical proximity to the item, or for it to be owned by a trust. The only legal ways to share a suppressor are to be physically present with it, or to transfer ownership to a trust or another qualifying individual.