Search legendary grenademod

I found a legendary grenade today, but some times later I’ve lost her in the masses of loot and don’t know her name.
The grenade split into two parts after the throw and they flew towards an enemy (but not very fast). During the flight the granates shoot and they had something like a red tail.
I would be glad if someone could tell me how this granademod is named, so that I can farm it and get it back. I would be happy to get it again. :grin: