As I've been working on a new Xonotic mod, I dug up two weapon models I ported a while ago to replace the old Shotgun / Machine Gun visuals. Nothing fancy just two meshes and textures I adapted from license compatible weapons I found on OpenGameArt:
https://opengameart.org/content/multi-gun
https://opengameart.org/content/multigun-textured
https://opengameart.org/content/a-104-cold-fusion-assault-rifle
There's an open pull request for accepting them in vanilla Xonotic, though it's unknown whether they will be. If not you can look at the changed files in my branch and copy them yourself if you wish to use those models for Vore Tournament... if anyone cares to and has issues let me know and I can attach a pk3.