Kind of a different stat suggestion, but I'm getting a vibe from this that it would make a better weapon than medigun. I think it's a combination of the nozzle as well as the sludge barrel.

Fire: Spills out toxic sludge in a puddle in a small proximity in front of the user
- No Alt-fire/uber

Holds 100 Ammo; 10 used per puddle created

Toxic sludge damages players similar to a flamethrower, until they find a medkit/medic/dispenser