So my buddy moved from Kansas to Oklahoma last month. He has a scorpion EVO s3 that is registered as an SBR and a suppressor for it. He knew he had to notify the ATF, but didn’t know he needed PRIOR on the SBR but not that suppressor. Now he isn’t sure what to do. Any advice I could pass along? I told him to make sure it doesn’t leave his safe until it is taken care of. Maybe he should go to an SOT?