Lucas Extreme Duty Gun Oil is designed for lubrication on all high-heat, high-use firearms and NFA items.. It offers superior burn-off resistance and has a polymeric film that protects metal from rust, moisture and dramatically reduces wear during any shooting condition. Applying it to your firearm makes cleaning up powder residue, copper and carbon fouling a simple task. You can even add it to your suppressor baffles to resist carbon building up. The superior blowback resistance keeps oil out of your face and off your glasses. When you need the best in firearm lubrication, you need Lucas Oil.