One thorough application of RIG Universal Gun Grease inside and out will protect your muzzle loader, shotgun, handgun or rifle against rust and corrosion. RIG is a superior firearm lubricant and preservative.  RIG is our first choice for rust prevention used on all the firearms in our museum! Available in three sizes: 1.5 oz. (No. 61020) 3 oz (No. 61027) 12 oz. (No. 61045).