I originally planned to release this after Project 8122, but since today is Christmas I decided to publish it today!
This is a railgun: a weapon which uses magnetic forces to propell a projectile at high speed. Theoretically it is possible in-game, but I just used a cannon part.
This is not to be confused with an ElectroMagnetic Launcher (EML), although it operates in a very similar way.
The weapon is quite large, but it should fit under the fuselage of any average-sized fighter.
A very stable plane is recommended.
And it's heavy; around 800 pounds.
Regardless, the destructive potential is limited only by the pilot's skill in aiming, as it is completely unguided. I ran thorough tests and it works well, but being a direct-fire weapon it can be somewhat unwieldy at long ranges.
It fires once every 1.4 seconds, during which, in narrative, the weapon recharges it's energy cells and loads the next shell.

Merry Christmas!

==CONTROLS==
Select "Railgun" in weapons (air or ground) and fire when ready