Sure. For example, somebody is going to the United States, and when they are there they go and buy a handgun barrel as a part. For example, they have maybe a specialized firearm, and they need a barrel. As they come across the border they would declare, “I am bringing in a handgun barrel”, in the same way that if you bring firearms into Canada you must declare them upon entry into Canada. You would show that you have a valid PAL, your licence. The customs officer would note it, and you would enter.
On May 11th, 2023. See this statement in context.