Lucas Extreme Duty Gun Oil Lucas Extreme Duty Gun Oil is a special blend of oil and petroleum-extracted additives producing a lubrication specially formulated for high volume, high heat and friction firearms. Lucas Extreme Duty Gun Oil is designed for semi-auto rifles, shotguns and pistols as well as full auto firearms and suppressors. It offers superior burn-off resistance. Its polymeric film protects metal from rust, moisture and dramatically reduces wear during all shooting conditions. 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. Designed for weapons that experience high volume, full auto, and suppressed fire Protects metal parts from rust, wear and moisture during extreme conditions Provides maximum heat resistance Superior blow back resistance, keeping oil out of your face and off your glasses