Authentic US Military Grade 30 Cal Ammo CanAuthentic US Military Grade 30 Cal Ammo Can The 30 Cal is also known as 7. 62MM 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. Even though they may or may not say 30 Cal on the side of the can, they are indeed, empty 30 Cal ammo cans. This product may or may not have the stamping on the front. Please remember these products are military surplus and could