If I recall correctly, aside from being about as accurate a rifle as Springfield makes, the scope base was ahead of the curve. I handled one down at Camp Perry when Springfield was there for the nationals and it looked as though the scope base was held in place in the front like a recoil lug between the barrel and the action - again if I recall correctly.
mounting a scope on an M14 has always been a bit of a trick, but not with the White Feather. They have it mounted real well, so the scope would hold it's zero big time. I'm also fairly certain that they used a rear lugged receiver - and quite possibly front and rear lugged receiver. Sorry, I just cant recall for certain.
I'll toss in a word of caution if serious about this sort of rifle.... it's heavy. If you want to watch bean fields for deer or shoot at the range you're all good, but your gonna need a good strong back if you want to use it on a deer drive.
Then again as the saying goes... Only accurate rifles are interesting.