200 Seriesl Ammo Boxes During these days of high volume reloading and bulk ammo storage, there has never been a better time for MTM to bring out a new stackable, 200 round ammo box series. Each size provides a sturdy 200 round base with two flip-top lids covering 100 rds. each. A strong snap latch secures each cover. Reliable mechanical hinges. Stable, multi-stack design. Made of tough, heavy-duty polypropylene. Comes with load label and MTM’s 25 year guarantee.