Silicone Gun Oil by Bisley

Produces a fine high sheen finish on all shotguns, rifles and airguns and accessories that protects from moisture and dirt, eliminating rusting and corrosion.
Produces a high sheen finish on all airguns
Stops the corrosive effects of fingerprints on airgun barrels
Highly water and dirt repellent
Beneficial to both barrel and stock
Does not evaporate like mineral oils.