The National firearms act (NFA) of 1934 regulates particular firearms and devices in the United Claims, trying to manage use of certain types of weapons. Understanding the types of governed weapons under the NFA is essential for pistol owners and enthusiasts.

1. Short-Barreled Guns (SBRs) and Shotguns (SBS)
Short-barreled rifles and shotguns are explained beneath the NFA as firearms with drums shorter than 16 inches for firearms and 18 inches for shotguns, or having an overall length significantly less than 26 inches. These firearms require subscription with the Bureau of Alcohol, Cigarette, Firearms, and Explosives (ATF) and the payment of a $200 tax press per firearm.

2. Device Guns
Device guns, also called fully automated firearms, are tools that can fire consistently with an individual take of the trigger. Under the NFA, these firearms are greatly controlled, requiring ATF registration and acceptance, combined with the cost of a $200 tax press per firearm. Importation of unit guns for private use has been prohibited because 1968.

3. Destructive Units (DDs)
Dangerous products contain certain forms of intense products, grenades, large-caliber firearms, and any tool with a bore over half an inch. They are subject to NFA regulations, requiring ATF subscription, background checks, and the payment of a $200 tax stamp per device.

4. Silencers (Suppressors)
Silencers, or suppressors, are products attached to the muzzle of a firearm to cut back the noise emitted when firing. Despite their rendering in media, they are regulated underneath the NFA, requesting ATF subscription, background checks, and the payment of a $200 duty press per silencer.

5. Any Other Weapons (AOWs)
Any Other Tools (AOWs) are a catch-all category for firearms that don’t squeeze into different NFA categories, such as hidden firearms, pencil guns, and firearms with particular style features. AOWs require ATF registration and approval, along with the cost of a $5 duty stamp per firearm.

Conclusion
The National Firearms Act categorizes and regulates specific types of firearms and units to make sure their managed ownership and used in the United States. Knowledge these groups is required for submission with federal legislation and for those thinking about possessing or handling managed firearms.