The only real other scenario that I can imagine is the fact it could be an ordinary Model 70 barrel and motion that has a replacement XTR stock. This is often not likely even though...I think that it's as you describe, an unmarked XTR. The sides are a little bit https://winchesterfeatherweight84371.dreamyblogs.com/27187589/the-smart-trick-of-winchester-model-70-xtr-featherweight-that-nobody-is-discussing