Ok I have up until now never needed such an animal ..
Got in a Remington made 1918 Mosin with a rough bore ..
Someone in their infinite wisdom cut the barrel down, added 70's ish Remington rifle sights and a homemade wooden Monte Carlo stock
Stock now switched out to an ATI Syn stock
The lands are fine after many swipes of bore brushes and various cleaners but there is still some stubborn buildup in the grooves..
This is the first gun that I just can't seem to get clean in the grooves
I would very much like to get this bore absolutely clean and thought of the outers system only to find out they are discontinued
Open to suggestions as I want to see this old girl shine again