The AC30C size ammo can is a very practical size for toting ammo and shooting accessories without the can becoming overly heavy or unwieldy. Its wide design keeps it stable and prevents it from tipping over easily.
 
These are ideal to have as a grab box for each gun filled with magazines, ammo, firearm specific stuff like mag loaders, tools, pull through, spares, etc.
 
"MTM ammo storage can are a great way to store bulk ammo. Wide design so it won't fall over. Storing and transferring ammo to and from the range, just became a little easier! Ideal for bulk 223, 9mm and 45 ammo. Molded out of rugged polypropylene plastic, these comfortably handled ammo cans will hold up to some pretty harsh treatment. Utilizing MTM's tongue and groove O-Ring seal system for a superior water-resistant seal. A heavy-duty dual latching system makes for a better seal and less likely to open accidentally. Double padlock tabs along with molded-in stacking ridges, make these solid containers the perfect solution to so many storage needs"