The Micro Gas Block is a uniquely designed gas block that is extraordinarily lightweight and one of the smallest size gas blocks available. This gas block is small enough to fit under most all factory or after market rails. Fitting .750 barrels it is small enough to fit under rails with even the smallest inner diameters. The Micro Gas Block has a Melonite/QPQ coating providing increased strength and protection against corrosion and wear. Proudly made in the United States of America!