Yep, When John mentioned that I saw them in Harrison's Book with the lower screw hole on them and also said No Markings. Maybe some were integrated late to NPM like he mentioned. I'm just glad it's not a T3. The Barrel looks like it never had a T3 on it. The Sear is Marked SW-N. I've seen a couple of them without the dash just SWN. Some NPM Sears I've also seen had some discoloration on them. I have to go back and find them so I can copy the address and post it. Maybe they were fake.