And the manufacture of the receiver is?There is a small indent, about the size of a pinhead and not deep enough for me to stick one in, at the front end of the receiver on my scout squad.
Devils advocate, if cast receivers unnerve you why did you purchase a SAI cast receiver. Looks like a flaw in the finish, not casting flaw. Shoot the rifle. Have fun be safe.It's Springfield Armory. My fear is that, because it's cast, there are bubbles in the receiver. Very uncommon, but I don't want a hunk of steel blowing up in my face and as far as guns go I was always taught better safe than sorry