Pity it couldn't be saved.
Nothing on these guns should be unobtainium in these days of CNC manufacturing.
Heat treatment and finding the exact material might be a problem but it should be doable.
With mini CNCs able to do brick sized parts we're not far from being able to machine everything but the barrels and mag tubes and possibly full stocks (as long as there's no hurry) just about anywhere.
If they can make full up replicas of top of the line military smallarms in the middle of nowhere Pakistan without much in the way of tools and using scrap salvage metals.
For the last 30 years (or last century) what can you make with a multi axis computer controlled milling machine and raw material that you KNOW is the right stuff.