Thanks. This is why it pays to have extra sets of eyes on it. I totally missed the bayonet lug being missing! And now there is more to the story. After talking to the seller and looking at the photos again, I remembered that I had seen this one at a recent gun show and had spent a few minutes examining it. I did notice the missing rear guard screw then, and the backwards band. Seller says bands are number matching. IIRC, the dealer was asking $795 for it, now offering to trade, but that sets a price in my mind, probably a high one given the issues. I don't recall when I examined it in person seeing any external stock markings, either serial numbers or acceptance marks. I figured it should be at least marked in the barrel channel. How about the hand guard? As a newbie it's still really hard for me to judge stock condition.