It was more about Peter explaining that all CDN rifles were demanded back at war's end. There was a directive that may or may not have been followed to the letter...it's here in the LE forum...
It wasn't all Canadian rifles that were to be returned, it was all C/l\ marked equipment including small arms that were to be returned. The C/l\ mark was a property mark. There were small arms made in Canada that were simply /l\ marked if they were made on British contract.