Cartridge

 is a Tier 4 Tank that upgrades from Heatseeker at level 45.

Design
The 's front barrel is identical to Heatseeker's. On the rear it has an additional decorative barrel that looks like a swarm spawner.

Technical
The 's bullets are homing like the Heatseeker, but they also have two swarm spawners mounted to their front and back. These swarm guns fire automatically and create AI-guided swarms.