I just received my M1 Carbine barreled receiver. Since CMP referred to this item as “junk” I didn’t anticipate anything higher but I did have a ray of hope. I am pleased with my win of an NPM receiver topped with a type II adjustable rear sight. The barrel sported a very clean gas piston and gas piston nut which was just another plus. The barrel appeared slightly discolored and the muzzle wear was almost nil and only slight rust at the chamber. After cleaning the bore the reality of rust rang true; The first 6 inches of bore looked pretty good and the last 6 inches of bore and chamber looked pretty good; the middle 6 inches is a ferrous oxide nightmare. Overall, however, I’m satisfied with the purchase. Now just to figure out how to remove the bad stuff in the middle (joke)...I'm going to rebarrel. I may have to fabricate a reason to order one more. Now it goes into my shop for a rebuild...love working on this things.