Backsword

The  is a Tier 5 Tank that upgrades from Silo at level 60.

Design
The looks identical to the Silo, but with a lance on the back. The lance looks identical to that of the Lancer.

Technical
The Silo barrels have the same stats as Silo, and the lance seems to have the same stats as Lancer. The tank does not seem to gain Lancer's speed boost, making using the lance very difficult.

As The Backsword
You Can Use Your Front Barrels(Which Have High Rate Of Fire, a.k.a RoF And High Bullet Speed)To Overwhelm Tanks Like The Borer, Assin, Etc. If You're Near The Pentagon Nest, You Can Occasionally Rotate Your Sword And Slay The Crashers Behind You.

Against The Backsword
Use Overpowering Tanks Like The Extirpator Or The Decentralizer To Overdo This Tank. Heck, Even The Copenhagen Could Probably Take This On With Ease. The Flat Earth Conspiracy Is More To Worry About Than This Tank.

Trivia

 * Despite having a lance mounted on the back, it cannot be obtained through Lancer branch at all.
 * Despite its name, it has no association with Sword.
 * This tank is similar to One Direction as they are both Tier 4 tanks with no changes other than gaining a lance on the back.