M-621 Ammo Box Posted on August 21, 2018 by gwebs plastic ammo box for 30, linked 25mm Cartridges opens on the bottom and top both lids have a hinge lids are not removable For the gun on the Bradley fighting vehicle 13.5” L x 5.6” W x 14.5” H NSN is 8140-01-121-9853 Drawing Number 12013854