OK... I went and pulled down the Montana State Firearms Law concerning barrel total, legal lengths. There's one phrase ... two phrases actually ... that qualifies what both you and I said as being accurate.....


(1) A person commits the offense of possession of a sawed-off firearm if the person knowingly possesses a rifle or shotgun that when originally manufactured had a barrel length of:

(a) 16 inches or more and an overall length of 26 inches or more in the case of a rifle;  or

(b) 18 inches or more and an overall length of 26 inches or more in the case of a shotgun;  and

(c) the firearm has been modified in a manner so that the barrel length, overall length, or both, are less than specified in subsection (1)(a) or (1)(b).

(2) The barrel length is the distance from the muzzle to the rear-most point of the chamber.



..... remember that there's a distinction between rifled and smooth bore for sake of clarity here.......