The TNA-80 is a pattern-deployable array of ultra-fine tungsten-alloy conductive needles designed for the ENAR-3 'Porcupine' incapacitation rifle. Each needle is 80mm long and 0.3mm in diameter — thin enough to penetrate skin and light clothing with minimal visible wounding but long enough to reach subcutaneous nerve pathways. The needles are coated in a hydrophilic compound that enhances electrical conductivity when in contact with biological fluid, turning each embedded needle into an electrode for the weapon's charge pattern system.

The needles are loaded in pre-configured pattern cassettes, each containing between 12 and 48 needles arranged in a specific geometric spread optimized for a particular incapacitation effect. The 8 pre-loaded charge patterns — from localized hand tremor to full-body incapacitation — correspond to cassette configurations that deliver needles to the optimal anatomical targets for that effect. A 'Hand Tremor' cassette deploys 12 needles in a tight cluster aimed at the forearm, while a 'Full Body Incapacitation' cassette spreads 48 needles across a torso-sized target area.

Each cassette is single-use — one discharge per cassette, requiring a reload between shots. This makes the ENAR-3 a slow-firing weapon by any standard, but its effects are immediate and precisely controllable. The needles themselves are designed to be minimally invasive: thin enough that most targets don't immediately realize they've been hit, with the hydrophilic coating preventing significant bleeding. Removal is straightforward for a medic with tweezers, though the electrical charge residue in the tissue can cause localized muscle fasciculation for hours after extraction.