Yep. For all its virtues the M12 isn't likely to ever be a collector's item, so a d&t won't hurt its value. If you look around the internet, though, you might find a suitable cantilever scope mount. I have one on my 10/22, but my barrel had to be d&t'd for it so even if you find a cantilever mount you still might have to drill it.I would do it as I wouldn't consider an M12 a collectible down the road.
I can usually find several for sale at the show so not rare. Great rifles, just heavy as heck.
More of a tool to be used for it's purpose.