The Independence 55gr 5.56x45mm is a true to spec 5.56 NATO round manufactured by Independence ammunition, who it owned and operated by Federal(ATK) ammunition. The 55gr 5.56x45 was made as a joint effort with IMI (Israel Military Industries) to help meet market need for high quality, affordable 5.56 ammunition. IMI is the government run facility that supplies the Israeli military with its ammunition. Whether you are looking to stock up for a rainy day, or need to get ready for a training class, the Independence 55gr 5.56x45mm is perfect for volume practice at a great price.