The Action Army Gear Grease lubricant was designed to facilitate a smooth operating airsoft gun. With the gearbox composed of metal moving parts, these parts will need some upkeep from time to time to avoid unnecessary wear and tear. Apply the grease to your airsoft gears to help ensure your gears proper operation free of friction and grinding that will wear out your gears and gunk up your gearbox with metal shavings. Manufactured in Japan, this grease lubricant features a highly viscous solution that won't break down under pressure when applied to ensure long and lasting protecting to your airsoft gun's infernal parts. Designed for use with any applicable airsoft product.