Yeah, it's fairly similar. If anything though, I still have other weapon ideas, so it's good.
EDIT: For instance...
Name: Mud Tracker
Colors: Dark Brown and Dark Red
Weapon Replaced: Water Wave or another floor hugging weapon.
Description:
Mud Tracker fires a sphere of mud that rolls on the floor at decent but not great speed, scattering small puddles of mud. Anyone stepping on the puddles will take 5 damage and will walk as if on ice for 6 seconds seconds. When the projectile hits a wall, it scatters a bit more mud puddles and disappears. If a player gets hit by the projectile itself, they take 40 damage, their running is as if walking on ice for 12 seconds and their vision is a bit clouded with a brownish color.
This weapon is mostly utility and shouldn't be used to frag someone. This is because it has 60 ammo and uses 20 per shot, plus it has a rate of fire of one shot every 3 seconds, which prevents spam.
The amount of puddles scattered and anything else can be adjusted as long as it doesn't stray away from the main idea of the weapon.
I have other ideas, but maybe later...