The 30 Cal is also known as 7.62 mm and M19A1. Our 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. These Ammo cans are from different parts of the military. Even though they may or may not say 30 Cal on the side of the can, they are indeed, empty 30 Cal Ammo cans. Please note when ordering if you have a preference as to whether the stenciling says "30 Cal" or "7.62 mm".