General silencer discussion. If you want to talk about a specific silenced rifle or pistol, it is best to do that in the rifle or pistol section for that brand.
you can answer "yes" on "are you under 21 years of age" and still be approved on any form 1, or on a form 4 being transferred from another individual or trust (not a dealer)
I had a customer buy a silencer. Before he took delivery, he got arrested for a felony. He was NOT indicted (yet), and thus not a prohibited person and could legally buy a handgun (or any other firearm). But his F4 was DISAPPROVED because the felony arrest was unresolved.