I just wouldn't have guessed that out of the millions of rifles manufactured one in the first 21000 manufactured would have found its way to me. When I made the order I even requested a replacement barrel because I thought that I may not be happy with how it would gauge and was more or less just looking for a project. I was advised elsewhere to go to the SS and pick one out, wait for a service grade etc. I think if I would have been able to do that I would have picked this one anyhow. It has HRA op rod and hammer, a WRA bolt D28287-1 SA trigger housing D28290-12, 12-44 SA barrel 7th round mod and what I believe to be a replacement stock Overton maybe and a gas cylinder with an O on the rear ring with a humped lock. There are no marks on the follower bullet guide or op rod catch. I need to study up more on the smaller bits for the purpose of being able to properly identify them. What I have done is, touch the muzzle up lightly with a Brownells hand turned cutter, a .302 pin gauge is tight. Strip clean and grease with bore clean that is still underway, free stuck ejector, gauge head-space and tilt test. What needs done is to tighten up the rear sight apparatus and thats all I'm going to do, and see how well it shoots of course and then just leave it alone. And get more pictures for those that want to see more.