Okay, so when we first heard about a new mysterious gun called the 'Magma Cannon', I think we all expected it to be a Medium class weapon.
And then LordFunPants teased a pic with it loaded on a Mobula and I was slightly disappointed. It was going to be a light class gun.
Don't get me wrong, I like the Hades. That thing looks wicked and it filled a niche a lot of people wanted filled.
It added another piercing option we all desperately needed giving Muse (awkm) some breathing room with the Gat and Merc.
But... I believe there's a pyromaniac in everyone that just wants to see airships burn on a massive scale.
And so I present to you, a real life weapon that was used in WWII (ww2 gets all the good stuff), the Flame Fougasse.
Here is it's Wiki entry:
http://en.wikipedia.org/wiki/Flame_fougasseAnd a short video showing what it does:
http://www.oliverbaker.co.uk/my-work/weaponology-fire/55As a viable weapon, I think it should be Medium Class, close range, and 1 shot with a massive reload time. Exact numbers can be discussed along with what it's second damage type should be.
You're welcome Cake!