Death Spinner
From Lexicanum
The Death Spinner monofilament gun is a weapon used by the Warp Spider Aspect Warriors.
Often just referred to as a 'Spinner', it uses the same basic technology as weapons such as Harlequin's Kiss and the Shadow Weaver. These weapons, including the Spinner, project a long thread of single-molecule chain, or monofilament wire. The weapon discharges a rapidly expanding mist-like mass called a "spinner cloud". Targets within the cloud are sliced apart as the wires writhe and lash. This weapon is only effective against unarmoured opponents and is easily withstood by armour.
The death part of the spinner has been deemphasized since second edition, where loose ends of the wire searched for the smallest loopholes in the target's armour. Once armour is penetrated the wire uncoils within the victim's body, liquefying innards and causing immediate death1-p.40.
