Not all buyer must fill out a 4473. At a gun show or store yes. Where it’s still legal to sell to your buddy, you can go have a nics run if you like. Or not. Other places where it’s mandatory to go through nics for private sales, the bad guys still wouldn’t care. But, I know what you’re talking about.
Yes, but for these stats (’1.6M guns sold in April’) they’re only counting retail sale, and at retail you have to fill out a 4473.