There are several type of Class 3 items that are restricted by the National Firearms Act.
Each state can impose additional restrictions on the sale, purchase, and transfer of class 3 firearms in addition to the compliance that is required with the national Firearms Act.
In North Carolina you can own the following items that are regulated the the National Firearms Act
Machine GunsIn North Carolina you cannot own the following NFA restricted items.
Silencers
Any Other Weapon (AOW)
Destructive Devices (DD)
Short Barreled Shotguns (SBS)
Short Barreled Rifles (SBR)
None
Follow this link to find out more about North Carolina and NFA restrictions on Class 3 Firearms
