These questions get asked often on CGN so here are some FAQ’s regarding shotgun barrel lengths:
Q: What is the shortest legal barrel length? (non-restricted)
A: If it is a manually operated shotgun (i.e. single shot, pump action, bolt action...) 18 inches is the shortest legal length it can be modified to. If the shotgun is a semi-automatic then 18.5 inches is the shortest barrel that will keep the firearm's non-restricted classification.
*note: If a manually operated shotgun came from the factory with a shorter barrel or if it is a commercially manufactured aftermarket barrel then there are no legal length restrictions and will still be considered non-restricted.
Q: What is the shortest OAL of a shotgun? (non-restricted)
A: 660mm or 26 inches.
Q: If I shorten my stock or barrel will it change the non-restricted classification of my firearm?
A: Not if you follow the the regulations.
*Manually operated shotguns must be over 26” in length and the barrel must be 18” or longer.
*Semi-automatic shotguns must be over 26” in length and the barrel must be 18.5” or longer.
Q: Can I shorten my own barrel or does it have to be sent to a gunsmith?
A: You can shorten your own barrel.
Q: If I shorten my own barrel what will happen to the choke?
A: There will be no choke. To understand the effects of a cylinder bore the firearm must be patterned.
Q: Do I need to report the changes I have made to the CFC?
A: You must notify the CFC if the changes you have made affect the classification of firearm - however it is always in your best interest to have the proper paperwork (barrel length & OAL) to match the firearm.
Q: I have seen non-restricted firearms that are shorter than what you have listed.
A: Firearm importers/retailers can apply for non-restricted classification of shorter firearms.
Here is some more info regarding barrel lengths and firearm classification:
*note: I have edited this information so as to only include information pertaining to shotguns.
CLASSES OF FIREARMS
PROHIBITED FIREARMS
Prohibited firearms are:
*full-automatic firearms
*sawed-off rifles or shotguns with barrel length less than 457mm (18 inches); this does not apply to firearms manufactured with short barrels
*sawed-off rifles or shotguns with overall length less than 660mm (26 inches); this does not apply to firearms manufactured with short stocks or short barrels
RESTRICTED FIREARMS
Restricted firearms are:
*semi-automatic centerfire firearms with a barrel length less than 470mm (18.5 inches) which are not prohibited
*firearms, which can be fired when reduced to a length of less than 660mm (26 inches) by folding/telescoping/etc., which are not prohibited
NON-RESTRICTED FIREARMS
Non-restricted firearms are:
*shotguns and rifles which are not restricted or prohibited
From the NFA's website:
If the barrel of any shotgun is cut to less than 18" by an individual or a gunsmith, that converts the firearm to "prohibited firearm" status. So does substituting a short barrel less than 18" long.
If the barrel of a manually-operated shotgun left the factory (either the original factory or a re-manufacturing factory) at a shorter length, that does not convert the shotgun to "prohibited" or "restricted status". It remains non-restricted.
If the shotgun is semi- automatic, shortening the barrel to less than 18.5", or substituting a barrel less than 18.5" long will make it a "restricted firearm." Shortening it to less than 18" or substituting a barrel less than 18" long will make it a "prohibited firearm." Replacing the barrel with one 18.5" long will put it back into the non-restricted class.
(Source: NFA)
I hope this information helps clear up some of the confusion surrounding shotgun barrel length and firearm classification.
- Darrell
Q: What is the shortest legal barrel length? (non-restricted)
A: If it is a manually operated shotgun (i.e. single shot, pump action, bolt action...) 18 inches is the shortest legal length it can be modified to. If the shotgun is a semi-automatic then 18.5 inches is the shortest barrel that will keep the firearm's non-restricted classification.
*note: If a manually operated shotgun came from the factory with a shorter barrel or if it is a commercially manufactured aftermarket barrel then there are no legal length restrictions and will still be considered non-restricted.
Q: What is the shortest OAL of a shotgun? (non-restricted)
A: 660mm or 26 inches.
Q: If I shorten my stock or barrel will it change the non-restricted classification of my firearm?
A: Not if you follow the the regulations.
*Manually operated shotguns must be over 26” in length and the barrel must be 18” or longer.
*Semi-automatic shotguns must be over 26” in length and the barrel must be 18.5” or longer.
Q: Can I shorten my own barrel or does it have to be sent to a gunsmith?
A: You can shorten your own barrel.
Q: If I shorten my own barrel what will happen to the choke?
A: There will be no choke. To understand the effects of a cylinder bore the firearm must be patterned.
Q: Do I need to report the changes I have made to the CFC?
A: You must notify the CFC if the changes you have made affect the classification of firearm - however it is always in your best interest to have the proper paperwork (barrel length & OAL) to match the firearm.
Q: I have seen non-restricted firearms that are shorter than what you have listed.
A: Firearm importers/retailers can apply for non-restricted classification of shorter firearms.
Here is some more info regarding barrel lengths and firearm classification:
*note: I have edited this information so as to only include information pertaining to shotguns.
CLASSES OF FIREARMS
PROHIBITED FIREARMS
Prohibited firearms are:
*full-automatic firearms
*sawed-off rifles or shotguns with barrel length less than 457mm (18 inches); this does not apply to firearms manufactured with short barrels
*sawed-off rifles or shotguns with overall length less than 660mm (26 inches); this does not apply to firearms manufactured with short stocks or short barrels
RESTRICTED FIREARMS
Restricted firearms are:
*semi-automatic centerfire firearms with a barrel length less than 470mm (18.5 inches) which are not prohibited
*firearms, which can be fired when reduced to a length of less than 660mm (26 inches) by folding/telescoping/etc., which are not prohibited
NON-RESTRICTED FIREARMS
Non-restricted firearms are:
*shotguns and rifles which are not restricted or prohibited
From the NFA's website:
If the barrel of any shotgun is cut to less than 18" by an individual or a gunsmith, that converts the firearm to "prohibited firearm" status. So does substituting a short barrel less than 18" long.
If the barrel of a manually-operated shotgun left the factory (either the original factory or a re-manufacturing factory) at a shorter length, that does not convert the shotgun to "prohibited" or "restricted status". It remains non-restricted.
If the shotgun is semi- automatic, shortening the barrel to less than 18.5", or substituting a barrel less than 18.5" long will make it a "restricted firearm." Shortening it to less than 18" or substituting a barrel less than 18" long will make it a "prohibited firearm." Replacing the barrel with one 18.5" long will put it back into the non-restricted class.
(Source: NFA)
I hope this information helps clear up some of the confusion surrounding shotgun barrel length and firearm classification.
- Darrell
Last edited:


















































