MTM Products AC3C: A rugged tactical carrying crate for multi-caliber ammo storage and transport. Comes with three, O-ring sealed 50 caliber ammo cans(AC50C) for multi-caliber ammo storage. 50 caliber ammo cans are a convenient size to store all types of boxed or bulk ammo. Each can nests within a rugged polymer crate to form a compact storage and transportation solution. As versatile as they are sturdy, loaded crates are stackable, with carry handles and tie-down points on either end for ATV attachment. Made of rugged polypropylene to last.