Depending on the weapon, it can be both.
No. Barrel must be at least 18" and overall length no less than 26"
26 inches overall with an 18 inch barrel.
Federal law requires that a shotgun have a minimum barrel length of 18" and a minimum overall length of 28". Colorado law is not more restrictive.
As long as you don't violate BATFE regulations on overall length (26" or longer) and barrel length (minimum 18"). Your barrel has to be over 18" long! I have shortened several, and make them at least 18 1/2" from the closed bolt, usually longer. Otherwise you are committing a federal felony.
There is no restriction on barrel length but the overall length of the firearm must be 26.5 in or greater
18 inches and a total overall length of at least 26 inches, just like in the rest of the US.
Any shotgun with a barrel length of less than 18 inches and/or an overall length of less than 26 inches.
The model with an 18.5" barrel has an overall length of 38.5", and with a 20" barrel, 41".
Must be a minimum of 26 inches in length, with a barrel no shorter than 18 inches. That's federal law.
Itis illegal for a private citizen to possess a sawed-off modern smokeless powder shotgun (a barrel length less than 18 in. or 46 cm and an overall length less than 26 inches). \
Only down to 18 inches, and it must still have an overall length of at least 26 inches.
A barrel no shorter than 18 inches in length. The overal total length of the firearm cannnot be less than 26 inches from the tip of the muzzle to the end of the buttstock.