Is it not all American made?
To be honest, I don’t really know, but SIGSauer has a very complex German/Swiss/American genealogy. Has an American offshoot in NH, but I don’t know if it has a manufacturing facility there, or just imports.
Good, well respected products. My major concern is the high chamber pressure, and consequent barrel wear. I was quite partial to the M-14, especially w/shortened barrel @ +/- 60k psi pressure as opposed to the 6.8x51 Sig @ 80k psi...but I don’t know about the ballistics downrange. If they’re similar, I’d opt for the M-14...but then again, it ain’t my decision.