Board Thread:Questions and Answers/@comment-84.80.169.173-20130629131909/@comment-5242951-20140405022655

Flak cannon: It has high damage and arcs, making it easier to hit out of reach places. When you first start you start with 1 shot and 10 when fully upgraded. However, it is a recommended choice if you don't like aiming since it is hard to directly hit someone with a flak cannon and it relies on splash damage.

Witch impaler: Lower damage, but shoots straight and fast, making hitting something easier. 4 ammo when you start and 12 when fully upgraded. If you are a sharpshooter or enjoy direct hits, this one is for you. Since it has lots of direct hits, obviously the splash damage is a very small area and doesn't do much. The quick firing and reload is a lot faster compared to the flak cannon, and is on par with the flak cannon when fully upgraded.