I wrote this in someone else's thread but I think I wrote it in a wrong thread and worried about thread jacking. So I started a thread I bought a used G26 last week and haven't shot it yet but I have cleaned it. I found out it was made april 2001. I didn't know how to inspect it properly, all i could tell was it was very clean, had original box but no papers with it. inside the slide was kinda dirty, not as bad as when I shoot about 500 rds in my G19. It still had a lot of the copper colored grease. It had the semi circle marks on the muzzle end of the barrel where the black finish has been removed. Some of the black finish has been removed around the feeding ramp. When i take a closer look down the barrel, overall its shiny, but along each side of the hexagonal rifling, I can see two marks (grooves maybe?) that are present along the length of the barrel, these marks are on each valley of the rifling. All I can say is that it is not as shiny smooth as the rest of the inside of the barrel. Is this something to be concerned about? I can't really get take a picture of it with my camera. The inside of my G19, which has about 1k rounds through it, is still shiny smooth.