By: Upright Blue, designed by Arceonn (https://twitter.com/arceonn)
The Anti-Air cannon, one of the FIRST weapons added to JB nearly a DECADE ago, now has its own model after being the last placeholder from those ancient times!
Normally, carrying around a full sized anti-air cannon would be rather difficult due to its size but thanks to the Aperture Science Mass Displacement Kinematics Tool, you can now carry a full sized cannon with zero issue*
*The Aperture Science MDK Tool does not mitigate any degree of recoil from the cannon itself.