The Amerikan Gestapo Department of InJustice division attorneys admitted in their Answering Brief in Robinson vs. Sessions, that the FBI screens all Amerikans seeking to lawfully purchase a firearm against the Terrorist Screening Database upon submission of ATF Form 4473. Since 2004, as part of its background checks for all potential firearms purchasers, the NICS has searched a file containing a list of known or suspected terrorists that is exported by the Terrorist Screening Center into the FBI’s National Crime Information Center database.
https://www.youtube.com/watch?v=Jtc4ZoRh_nU
