In the Resident Evil Outbreak series, ammunition boxes are composed of individual cartridges unlike in other Resident Evil games.
Every firearm in the series possesses an initial clip inside; but to reload it, each cartridge must be manually placed inside the gun by holding down the reload button or combining the ammo box with the weapon in the menu. The reload process can take a long time, depending on the number of bullets spent and the clip capacity.
The Submachine gun of the Outbreak series can be reloaded manually (which really takes a while, given its large capacity clip), or the player can use SMG magazines instead.
Submachine Gun Magazines are extra 30 round clips found in-game, initially fully loaded with 9mm parabellum bullets. By using SMG Magazines, reloading can be done in an instant. Take note that the SMG uses the same 9mm ammo of the handguns in the series.
Pressing the reload button or combining the item with the weapon will exchange the SMG's old clip for the new clip, leaving the used one in the inventory. To refill empty or partially empty magazines, combine handgun bullets with the item in the menu.
- If the player presses the reload button, the magazine with the most rounds inside the player's inventory will be used to reload. (Example: If the SMG has an empty clip, and the player has one fully loaded magazine and one partially loaded magazine in his/her inventory, the fully loaded one will be used)
- If the player uses the inventory menu to combine the magazine with the gun for reloading, the player can reload with any magazine, irrespective of bullet amount.