This Gun Part = BACKGROUND CHECK
This video from GUNBROS explains a critical distinction in firearm purchasing: a bare AR-15 lower receiver, even just a piece of milled aluminum, is considered the firearm and requires a background check (Form 4473). Conversely, a complete upper receiver is treated as an accessory and can be shipped directly to your door without a background check. The explanation highlights the importance of understanding ATF classifications for compliance.













