Yes, it's a MicroGroove, but I remmember my newer MicroGroove was a lot shinier and the rifling was more distinct. Looking down this barrel, all I see is what appears to be minute scratches, but I'll try a better light.
edit-Just checked it out in the sunlight and it appears as though a half a bottles of hoppes, about a hundred patches and a brash brush weren't good enough last night. Looking through the barrel, it looks as if it were a freshly honed cylinder head, with rifling going one direction, and brush marks in the grime going the other way. I just hope it's the surface of the grime that I scratched. A brass brush won't scratch a bore will it?