Geargrinder

 is a Tier 5 Tank that upgrades from Clockwork, Swarmer and Carrier at level 60.

Design
The looks very similar to the Clockwork, but it has a third Cruiser-like barrel between its rear two swarm barrels. This makes it rear section resemble Carrier. Additionally, its frontal gears are upgraded from Mini Swarmer bullets to Swarmer bullets with 5 bee barrels each.

History
At an unknown date, the Geargrinder was added.

At some point, its central swarm barrel was removed and stopped branching from Carrier.