Well that makes it a little bit more difficult for me to come have a look at it
I did hear a story about special forces during WW2 removing markings off equipment, it went along the lines of not letting the enemy know who the gear belonged to, but I could never see how that would work, as I'm sure the enemy were aware of the equipment used by their enemy, as we were.
I wouldn't say it made it stolen either, but sounds like a bit of a puzzle for you to work out
As I am not aware of the laws governing markings/serial numbers in your part of the world, I cant comment on how it would be received on the range, probabally best you ask first.
Hope some of this is helpful.
Cheers
Alex