If the can is permanently attached and makes the barrel longer than 16 inch than it is just a suppressor. I'd the barrel is shorter than 16 inch regardless if the can is permanent or not it is n bar and will require a stamp.
So an integral 10/22 that is a total of 14 inch than it Is a two stamp gun
So an integral 10/22 that is a total of 14 inch than it Is a two stamp gun