It's real but it's a later M1. Maybe 60's vintage. We used those in the Canadian army for years so that's not too rare around where you are. Currie Barracks and the PPCLI were there for years and the Queens Own Rifles of Canada
before then. Sarcee had the LDSH Armoured regiment. This was standard equipment. You also had Crown assets in Calgary and they sold thousands of those over the years.