That’s the stuff, I believe that it is Iosso in a little lighter viscosity liquid. It comes with a “flush” for cleaning out the cleaner.
I use Iosso blue nylon brushes, a little more money, but worth it, they last longer. I use ThorroClean with just the brush and also with a wrapped patch. All my barrels look like the photo. Clean after a two day match ~ 150 rounds. IMO the best cleaner I’ve found.