Board Thread:Suggestions/@comment-34064213-20180727004024

Context
Originally, back in the DEMO days, there was a plan to have the 3rd attachment slot (the blue slot) to be for interchangeable cartridges. So, in theory, you would be able to change between different cartridges, each with their own attributes and playstyle.

Summary
In the 3rd attachment slot, you would be able to change which kind of cartridges go into your magazines. They both, however, have their own upsides and downsides. For instance, the Piercing Cartridges would give Hard Impact 2, but in exchange would decrease your bullet speed by 10% and it costs $500 more. The Bigger Cartridges would deal 5 more damage, but the magazine size would decrease by 4 rounds in exchange. The Smaller Cartridges would boost your magazine capacity by 5, but would lower the damage by 2.

Background Story
Survivors, yet again, felt something was wrong with their weapons. However, this time, it wasn't about the weapon itself, but rather the bullets they shoot. It was a difficult problem that survivors were trying to think of how to solve, until a bright survivor though of a way: Basically, have interchangeable cartridges for guns that improved performance in different ways. Within a week, this idea became a reality and shops around the world were selling different cartridge options.

Tips

 * If you're equipping the Piercing Cartridges, it is recommended to stay close to individual zombies, as your bullet speed would be lowered. Save most of your rounds for hordes, since Hard Impact is useful for those kinds of situations.
 * If you're using the Bigger Cartridges, it is recommend to equip them on guns with a high ammo count like the M249 and not so much for guns like the Skorpion with a low ammo count that drains easily.
 * If you're using the Smaller Cartridges, it is recommended to use them on guns with a low ammo count like the Skorpion in particular so they have a higher chance of hitting something due to how the Skorpion encourages a Spray-And-Pray attitude.

Trivia
 
 * This is the first attachment to go into the 3rd attachment slot
 * On top of that, this is the first attachment to modify damage
 * This would be the first attachment to have 3 variants, second to the Reload Speed attachment.
 * This attachment is the first to give any form of Hard Impact.