When calling in a NICS background check, the make, model or serial number of the gun being purchased are not disclosed. It is purely a background check on the person buying the gun.
Maybe I am missing something but how is a background check registration?
It's not. Registration is when you have to register each gun in your safe. Background checks are also supposed to be destroyed after a certain time. I 100% do not support registration but I do think that if you are going to buy & sell more than 3-4 guns a month at a gun-show or online, getting an FFL isn't a bad idea. Perhaps BATF could develop a "hobbyist" FFL, similar to a C&R license, or broaden C&R regs to meet that definition.
Cush brings up some valid points. I have a couple of family members who would fit his description.