Provides protection from the elements for M-16 AR-15 style rifles. Simply slip the dust cover over the magazine well to block dust, dirt, and other problem causing contaminants. This reduces the chance of malfunctions such as jamming, and can substantially increase the life of the firearm. Especially useful in sandy desert environments. Made for excellent abrasion, cut, tear, deformation and flame resistance. Provides protection from ozone, water, acids, bases, grease, salts, seawater, oil, fuel, and alcohol with a temperature range of -20˚ to 250˚ Fahrenheit.