The guy from Poland brought all his AEGs in his luggage on the plane.
He took them apart and separated the recievers in case customs wanted to confiscate the recievers.
They never even opened his luggage and so he moved all his guns from Europe to Canada with no problems. Like all things, it is luck - the same for shipping through the mail. Sometimes customs fails to check a box.
AUGs are not that popular around here. A friend bought an upgraded TM AUG from this forum for $300. Other guns will be much more expensive and harder to find. The hardest things to get in Canada are recievers. Only M4 recievers are ever really sold. Most imported things are complete guns. You are better to buy an entire new weapon here.