MC3000® Semi-Fluid Lubricant is a custom-blended, intermediate viscosity lubricant developed for applications demanding performance features ranging between those delivered by the viscosities of TW25B® Light Grease and MC2500® Oil. Mil-Comm formulated this extraordinary lubricant especially for use by the U.S. Air Force and U.S. Navy 20mm gun systems aboard F-15, F-16 and FA-18 Fighter Jets. Effective for all types of weapons, but specially engineered for Gatling and machine guns operating in all climates and conditions. All-synthetic.