Here's how it works:
Local law enforcement sends ATF the particulars on the gun they've seized: the manufacturer, model, caliber, serial number. ATF then starts running that information back through the distribution chain, contacting the gun manufacturer — say, Glock or Smith & Wesson — and the manufacturer checks its records and identifies the wholesaler it sold the firearm to.
4473 that the buyer and dealer have to fill out before a sale
Thanks to the NRA lobbying activities, this is how the ATF tracks firearm purchases.
-------------------
Americans of high-school age are 82 times more likely to die from a gun homicide than 15- to 19-year-olds in the rest of the developed world.
https://www.theatlantic.com/politics/archive/2018/05/its-the-guns/560771/
But politicians are blaming doors, B. DOORS!!!
SMDH...