The Prep Bible.
MTM Case-Gard AC50C11 is a standalone ammunition can made of polypropylene, finished in forest green. It holds up to 30 lb, includes water-resistant, stackable, and lockable features, and measures 7.5 in wide, 8.5 in high, and 13.5 in long while weighing just 1.7 lb. It's built for someone who wants a single sealed container to store and transport ammo on its own.
MTM Case-Gard MAC30 Tray is a different kind of product, a plastic tray in dark earth designed to hold up to 4 metal ammo cans at once. It's stackable and fitted with heavy duty handles, with a weight capacity of 100 lb and larger overall dimensions of 12.5 in wide, 4.8 in high, and 19.5 in long. This suits someone who already owns metal ammo cans and wants an organized way to carry several of them together.