I would be very surprised if a lot of off books sales aren't happening, especially with people being worried what the government might be up to. Here in AZ private party sales are still legal, thankfully, and I know of a few guns that legally passed from one legal person to another without government involvement. Arizona takes the stand that if both parties are not prohibited possessors and the gun is legal, they don't care. As for the huge uptick in sales, this has been going on since the start of the plandemic, and show no signs of tapering off. At least some ammo and reloading components are starting to trickle back in.