A handle-only weapon that deploys a 15-centimeter blade of monofilament wire held rigid by an electromagnetic tension field. The Gossamer's 'blade' is a single strand of carbon monofilament 3 nanometers in diameter — effectively invisible to the naked eye and sharp enough to cut at the molecular level. The electromagnetic field generator in the handle keeps the wire rigid and provides a faint blue luminescence along the wire's length — the only visual indication that the weapon is active.

The MW-3 cuts through conventional materials with zero resistance. Steel, composite, ceramic, flesh — the monofilament passes through everything at the molecular level, leaving wounds so clean that they do not bleed immediately. Victims of a Gossamer cut often do not realize they have been injured until they move and the separated tissue shifts apart. The weapon's limitation is its fragility — the monofilament wire breaks if it contacts material harder than its own carbon structure (diamond, certain advanced ceramics), and replacement wires cost Φ2,000 each.

Crucible developed the MW-3 for precision industrial cutting applications before the design was adapted for covert operations. The weapon's invisible blade and clean-cut capability make it the ultimate close-range assassination tool — a Gossamer cut across a throat produces no spray, no sound, and the target may walk several steps before collapsing. The psychological impact on witnesses who see a person simply come apart along invisible lines is considerable.