SBRs: barrel swaps, shoulder stocks and unserviceable firearms

May the short barrel on an SBR or SBS be replaced with a long barrel for hunting or other purposes, with the intent of replacing the short barrel?

Yes, and you will not be required to again register the firearm before replacing the short barrel. The ATF recommends written notification to the National Firearms Act (NFA) Branch when a firearm’s configuration is permanently changed or removed from the purview of the National Firearms Act (NFA).

What is an unserviceable firearm?

An unserviceable firearm is defined as one which is incapable of discharging a shot by means of an explosive and which is incapable of being readily restored to a firing condition. An acceptable method of rendering most firearms unserviceable is to fusion weld the chamber closed and fusion weld the barrel solidly to the frame. Certain unusual firearms require other methods to render the firearms unserviceable. An unserviceable Title II firearm is still subject to the controls of the National Firearms Act (NFA) but may be transferred tax free as a curio or ornament.

If a person has a pistol and an attachable shoulder stock, does this constitute possession of an NFA firearm?

Yes, unless the barrel of the pistol is at least 16 inches in length (and the overall length of the firearm with stock attached is at least 26 inches). However, certain stocked handguns, such as original semiautomatic Mauser “Broomhandles” and Lugers, have been removed from the purview of the NFA as collectors’ items.

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The information contained on this website is provided for educational and informational purposes only. It is not legal advice and should not be construed as providing legal advice on any subject matter. Colorado and federal laws frequently change. As a result, the content on this website is not necessarily up to date, nor comprehensive. Contact us or another attorney with any legal questions specific to your matter.