Case Box, .50 MG

 is a type of Miscellaneous item in Fallout: New Vegas.

Characteristics
Case Boxes contain cases used in crafting the type of ammo on their label. Each box contains 25 case, .50 MG. To get the cases added to your inventory to be used for crafting, drop the box and then pick it up again-- it will add the individual cases and not the box.