clandestine
AR-15 Savant
What about running a bore snake through the barrel after every half dozen to a dozen trips to the range? I guess this question could be for all firearms, not just AR's.
It can work to remove loose fouling bit thats all they are good for. In the field its ok, but I prefer to use a one piece rod and a patch & jag to push stuff out.
When you do use one, be sure to pull it straight out of the muzzle. If you pull it at an angle the embedded carbon in the snake can round out the crown.
If you do use a bore snake understand that every time you use one, it can snap and get stuck in the bore. Getting one out can mean you have to pay a smith and/or you may still end up with a damaged barrel. That wont happen with a solid rod, jag, and proper sized patch.
Bore snakes are perishable as well. Cut them up and throw them away after using them often, or they het old.
If I had to choose between a bore snake and a sectioned rod to clear my barrel, it would be the sectioned rod. A sectioned rod is also useful to clear stuck casings in the field.