The Military Pack is one of the many kinds of backpacks that can be found. It's the largest and rarest backpack and gives you 2 more inventory slots than the survival pack, bringing the total number of main inventory slots to the maximum, which is 20. It adds 8 total slots to your inventory. This item is considered a trophy to those who possess it, as it indicates a milestone in their experience and add more valuable loot to their collection, especially the black version of this backpack, which is an infamous bandit symbol. However, it does stick out a bit making others being able to see you.
This is the largest bag in Apocalypse Rising, adding 8 slots to your inventory, and like every other backpacks, as of v5.0.0, has different colors. The pack can be found at military locations, such as the bunker, and other places like those but can also spawn in major cities or small towns. The Military Pack has about the same volume as your body and legs. It has many pouches and a cylindrical pouch in the middle of it. It is very large, making it spottable when worn, even from a distance but could be mistaken as a survival pack. Despite being large and clunky looking and very visible to players, this does not contribute to visibility to zombies. It comes in: Olive Green, Stone Gray, Dark Green, and Black.
The Backpack in Apocalypse Rising v.1.0.0 was the only pack in the game. It unlocks the rest of your slots. The backpack can be found everywhere, and is green.