The 30 Cal is also known as 7.62MM and M19A1. The 30 Cal Military Grade Ammo Cans feature a hinged lid with a tension clamp-down, a rubber seal on the lid and a carrying handle. Even though they may or may not say 30 Cal on the side of the can, they are indeed, empty 30 Cal ammo cans. For Grade 1, outside of the can may have light exterior rust from storage, small paint dings, and/or surface scratches from storage. The stenciling may vary and show wear such as fading. The inside of the can will be free from rust and/or paint. The lid will be fully functional with all pins and watertight rubber seal.