I'm making a couple of weapons from Terry Brooks's "Genesis of Shannara" trilogy and "Legends of Shanarra" duology (second book due out next year). One of these is a powerful shotgun called a Tyson Flechette. It's capable of cutting large swaths through groups of enemies, and I've gotten the weapon balanced the way I want it, but the model I'm using for it just doesn't work. I did a little searching online and found one bit of fanart that shows what one fan thinks it should look like:
http://fc05.deviantart.net/fs37/i/2008/259/b/9/Knight_Of_The_Word___WIP_by_BloodRedFullMoon.png
(the black staff is a powerful magical artifact known as a Staff of the Word or a Knight of the Word's staff)

So I'm looking for a model that works for this gun, that exact appearance is not necessary, but I do need something that works with existing animations, or includes its own animations. Can anyone point me to such a model that I can use?

I'm also looking for a model for another weapon, an automatic rifle called a Parkhan Spray. My concept on it is that it's big and bulky but with a high ROF and exceptional accuracy, and lighter than it appears. Any models that fit that bill?