Bore Tech C4 Carbon Remover
When you shoot pistols a lot, you can build up carbon is many areas of the pistol. Shotguns, you know you have a problem with carbon build up. AR15 & AR9, carbon build up is an everyday thing. I have tried many carbon removers from different manufacturers and I find C4 works the best of all of them. Available in a 16 ounce or 4 ounce bottle.