I have always wondered how it was determined that a cover has been scrubbed and stamped just by looking at the difference in the font. I would think that without the stock on and cover in place, taking a straight edge would be able to determine if metal was removed. I remember pictures that running-man posted showing 2 sets of serial numbers(one very faint), which is an conclusive indication. Also the way it sits in the receiver, should also be an indication. Also, I forgot to welcome a fellow Canadian to this site. Enjoy the ride.