It is my understanding that you must keep your papers with your suppressor at all times so you can prove it's legality if need be. Is it ok to keep a copy of the papers with the suppressor and keep the originals locked up or in a safe deposit box? Also, I am nervous about the no-knock warrant aspect of getting a suppressor. Is this a common thing for the ATF to show up and do a site inspection? I have two guns threaded and ready to go, but I'm hesitant with the current political climate. Thanks in Advance Wanna kill these ads? We can help!