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Bureau of Alcohol, Tobacco, Firearms and Explosives

What is the registered part of a Short Barreled Rifle (SBR) or Short Barreled Shotgun (SBS)?

While a receiver alone may be classified as a “firearm” under the Gun Control Act (GCA), SBRs and SBSs are classified in totality under the National Firearms Act (NFA). A firearm that meets the definition of a SBR consists of a rifle that has a barrel less than 16 inches in length. A SBS consists of a shotgun that has a barrel less than 18 inches in length. The serialized receiver is recorded for registration in the National Firearms Registration and Transfer Record (NFRTR).