Used and recommended by gun manufacturers throughout the industry, 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 high friction usage. Designed for all semi-automatic firearms as well as suppressors, Lucas Gun Oil forms a polymeric film that protects metal from rust, moisture, and dramatically reduces wear due to its superior burn-off resistance. Extended shooting sessions are no longer a problem, by applying Lucas Extreme Duty Gun Oil to bores, bolt carriers, gas pistons, and handgun rails, metal-on-metal parts remain lubricated, and clean up of powder residue, as well as carbon and copper fouling is greatly accelerated. Applying a light coat to suppressor baffles and mounts ensure resistance to carbon build up as well as make for easy cleaning. In addition, Lucas Extreme Duty Gun Oil neutralizes the acids in fingerprints and resists drying for long term storage purposes. Developed for demanding lubrication during hard use. Made in the U.S.A. 4oz bottle.