PTR either modifies the length of the barrel for the Jack or they are purchased that way from Mossberg. All barrels are cut to length at some point during the manufacturing process. The Canadian law prohibits individuals from altering the barrels after the firearm is manufactured.. By adding a compliant stock and making the length of the shotgun 26" it will then be non restricted.You might want to double-check that those short barrels are actually made from scratch.
(not just a sawed-off Mossberg barrel).
It's an important distinction in Canada.
The IRUNGUNS Team