Sickle

 is a Tier 5 Tank that upgrades from Nailgun and Clicker at level 60.

Design
The is just a Nailgun with a Clicker stuck on the back of it. Both tanks look identical to their normal counterparts.

As the

 * The is literally two tanks in one, so it has decent versatility.
 * It is somewhat awkward to use the Clicker form so practicing aiming backwards is essential to effectively use this tank.