Applying Lucas Extreme Duty Gun Oil to bores, bolt carriers and gas pistons makes clean-up of powder residue, copper and carbon fouling a much easier task. Apply a light coat to suppressor baffles and mounts to resist carbon build up and to make cleaning quicker and easier. It neutralizes acids from fingerprints and resists drying for long term storage use. Lucas Extreme Duty Gun Oil is great for lubrication on all high heat high use firearms and NFA items.